From dcfbbf3db7761b88b8ca801454e90e738a98ec14 Mon Sep 17 00:00:00 2001
From: Lukas Reschke <lukas@statuscode.ch>
Date: Sat, 13 Oct 2012 22:29:57 +0200
Subject: Revert "Update SabreDAV to 1.7.1"

This reverts commit 183cc22501b75ab8819971f70b88dbc010026ac1.
---
 3rdparty/Sabre/CalDAV/Backend/Abstract.php         | 190 +++----
 3rdparty/Sabre/CalDAV/Backend/BackendInterface.php | 231 --------
 .../Sabre/CalDAV/Backend/NotificationSupport.php   |  47 --
 3rdparty/Sabre/CalDAV/Backend/PDO.php              | 337 +-----------
 3rdparty/Sabre/CalDAV/Backend/SharingSupport.php   | 238 ---------
 3rdparty/Sabre/CalDAV/Calendar.php                 |  63 +--
 3rdparty/Sabre/CalDAV/CalendarObject.php           |  22 +-
 3rdparty/Sabre/CalDAV/CalendarQueryParser.php      |  12 +-
 3rdparty/Sabre/CalDAV/CalendarQueryValidator.php   |  28 +-
 3rdparty/Sabre/CalDAV/CalendarRootNode.php         |  13 +-
 .../CalDAV/Exception/InvalidComponentType.php      |  32 --
 3rdparty/Sabre/CalDAV/ICSExportPlugin.php          |   6 +-
 3rdparty/Sabre/CalDAV/ICalendar.php                |  21 +-
 3rdparty/Sabre/CalDAV/IShareableCalendar.php       |  48 --
 3rdparty/Sabre/CalDAV/ISharedCalendar.php          |  22 -
 3rdparty/Sabre/CalDAV/Notifications/Collection.php | 169 ------
 .../Sabre/CalDAV/Notifications/ICollection.php     |  22 -
 3rdparty/Sabre/CalDAV/Notifications/INode.php      |  38 --
 .../CalDAV/Notifications/INotificationType.php     |  43 --
 3rdparty/Sabre/CalDAV/Notifications/Node.php       | 188 -------
 .../CalDAV/Notifications/Notification/Invite.php   | 276 ----------
 .../Notifications/Notification/InviteReply.php     | 216 --------
 .../Notifications/Notification/SystemStatus.php    | 179 -------
 3rdparty/Sabre/CalDAV/Plugin.php                   | 579 ++++-----------------
 .../Sabre/CalDAV/Property/AllowedSharingModes.php  |  72 ---
 3rdparty/Sabre/CalDAV/Property/Invite.php          | 173 ------
 .../CalDAV/Property/ScheduleCalendarTransp.php     |  99 ----
 3rdparty/Sabre/CalDAV/Schedule/IMip.php            |  18 +-
 3rdparty/Sabre/CalDAV/Schedule/Outbox.php          |  10 +-
 3rdparty/Sabre/CalDAV/Server.php                   |  68 +++
 3rdparty/Sabre/CalDAV/ShareableCalendar.php        |  72 ---
 3rdparty/Sabre/CalDAV/SharedCalendar.php           |  98 ----
 3rdparty/Sabre/CalDAV/SharingPlugin.php            | 475 -----------------
 3rdparty/Sabre/CalDAV/UserCalendars.php            |  64 +--
 3rdparty/Sabre/CalDAV/Version.php                  |   2 +-
 3rdparty/Sabre/CalDAV/includes.php                 |  25 +-
 36 files changed, 360 insertions(+), 3836 deletions(-)
 delete mode 100755 3rdparty/Sabre/CalDAV/Backend/BackendInterface.php
 delete mode 100755 3rdparty/Sabre/CalDAV/Backend/NotificationSupport.php
 delete mode 100755 3rdparty/Sabre/CalDAV/Backend/SharingSupport.php
 delete mode 100755 3rdparty/Sabre/CalDAV/Exception/InvalidComponentType.php
 delete mode 100755 3rdparty/Sabre/CalDAV/IShareableCalendar.php
 delete mode 100755 3rdparty/Sabre/CalDAV/ISharedCalendar.php
 delete mode 100755 3rdparty/Sabre/CalDAV/Notifications/Collection.php
 delete mode 100755 3rdparty/Sabre/CalDAV/Notifications/ICollection.php
 delete mode 100755 3rdparty/Sabre/CalDAV/Notifications/INode.php
 delete mode 100755 3rdparty/Sabre/CalDAV/Notifications/INotificationType.php
 delete mode 100755 3rdparty/Sabre/CalDAV/Notifications/Node.php
 delete mode 100755 3rdparty/Sabre/CalDAV/Notifications/Notification/Invite.php
 delete mode 100755 3rdparty/Sabre/CalDAV/Notifications/Notification/InviteReply.php
 delete mode 100755 3rdparty/Sabre/CalDAV/Notifications/Notification/SystemStatus.php
 delete mode 100755 3rdparty/Sabre/CalDAV/Property/AllowedSharingModes.php
 delete mode 100755 3rdparty/Sabre/CalDAV/Property/Invite.php
 delete mode 100755 3rdparty/Sabre/CalDAV/Property/ScheduleCalendarTransp.php
 create mode 100755 3rdparty/Sabre/CalDAV/Server.php
 delete mode 100755 3rdparty/Sabre/CalDAV/ShareableCalendar.php
 delete mode 100755 3rdparty/Sabre/CalDAV/SharedCalendar.php
 delete mode 100755 3rdparty/Sabre/CalDAV/SharingPlugin.php

(limited to '3rdparty/Sabre/CalDAV')

diff --git a/3rdparty/Sabre/CalDAV/Backend/Abstract.php b/3rdparty/Sabre/CalDAV/Backend/Abstract.php
index 88e5b4a1a07..7aba1d69ffe 100755
--- a/3rdparty/Sabre/CalDAV/Backend/Abstract.php
+++ b/3rdparty/Sabre/CalDAV/Backend/Abstract.php
@@ -1,19 +1,47 @@
 <?php
 
-use Sabre\VObject;
-
 /**
  * Abstract Calendaring backend. Extend this class to create your own backends.
  *
- * Checkout the BackendInterface for all the methods that must be implemented.
- *
  * @package Sabre
  * @subpackage CalDAV
  * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
+ * @author Evert Pot (http://www.rooftopsolutions.nl/) 
  * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
  */
-abstract class Sabre_CalDAV_Backend_Abstract implements Sabre_CalDAV_Backend_BackendInterface {
+abstract class Sabre_CalDAV_Backend_Abstract {
+
+    /**
+     * Returns a list of calendars for a principal.
+     *
+     * Every project is an array with the following keys:
+     *  * id, a unique id that will be used by other functions to modify the
+     *    calendar. This can be the same as the uri or a database key.
+     *  * uri, which the basename of the uri with which the calendar is
+     *    accessed.
+     *  * principaluri. The owner of the calendar. Almost always the same as
+     *    principalUri passed to this method.
+     *
+     * Furthermore it can contain webdav properties in clark notation. A very
+     * common one is '{DAV:}displayname'.
+     *
+     * @param string $principalUri
+     * @return array
+     */
+    abstract function getCalendarsForUser($principalUri);
+
+    /**
+     * Creates a new calendar for a principal.
+     *
+     * If the creation was a success, an id must be returned that can be used to reference
+     * this calendar in other methods, such as updateCalendar.
+     *
+     * @param string $principalUri
+     * @param string $calendarUri
+     * @param array $properties
+     * @return void
+     */
+    abstract function createCalendar($principalUri,$calendarUri,array $properties);
 
     /**
      * Updates properties for a calendar.
@@ -47,7 +75,7 @@ abstract class Sabre_CalDAV_Backend_Abstract implements Sabre_CalDAV_Backend_Bac
      * (403 Forbidden), which in turn also caused {DAV:}owner to fail
      * (424 Failed Dependency) because the request needs to be atomic.
      *
-     * @param mixed $calendarId
+     * @param string $calendarId
      * @param array $mutations
      * @return bool|array
      */
@@ -58,97 +86,83 @@ abstract class Sabre_CalDAV_Backend_Abstract implements Sabre_CalDAV_Backend_Bac
     }
 
     /**
-     * Performs a calendar-query on the contents of this calendar.
-     *
-     * The calendar-query is defined in RFC4791 : CalDAV. Using the
-     * calendar-query it is possible for a client to request a specific set of
-     * object, based on contents of iCalendar properties, date-ranges and
-     * iCalendar component types (VTODO, VEVENT).
-     *
-     * This method should just return a list of (relative) urls that match this
-     * query.
-     *
-     * The list of filters are specified as an array. The exact array is
-     * documented by Sabre_CalDAV_CalendarQueryParser.
-     *
-     * Note that it is extremely likely that getCalendarObject for every path
-     * returned from this method will be called almost immediately after. You
-     * may want to anticipate this to speed up these requests.
+     * Delete a calendar and all it's objects
      *
-     * This method provides a default implementation, which parses *all* the
-     * iCalendar objects in the specified calendar.
-     *
-     * This default may well be good enough for personal use, and calendars
-     * that aren't very large. But if you anticipate high usage, big calendars
-     * or high loads, you are strongly adviced to optimize certain paths.
-     *
-     * The best way to do so is override this method and to optimize
-     * specifically for 'common filters'.
-     *
-     * Requests that are extremely common are:
-     *   * requests for just VEVENTS
-     *   * requests for just VTODO
-     *   * requests with a time-range-filter on either VEVENT or VTODO.
-     *
-     * ..and combinations of these requests. It may not be worth it to try to
-     * handle every possible situation and just rely on the (relatively
-     * easy to use) CalendarQueryValidator to handle the rest.
+     * @param string $calendarId
+     * @return void
+     */
+    abstract function deleteCalendar($calendarId);
+
+    /**
+     * Returns all calendar objects within a calendar.
+     *
+     * Every item contains an array with the following keys:
+     *   * id - unique identifier which will be used for subsequent updates
+     *   * calendardata - The iCalendar-compatible calendar data
+     *   * uri - a unique key which will be used to construct the uri. This can be any arbitrary string.
+     *   * lastmodified - a timestamp of the last modification time
+     *   * etag - An arbitrary string, surrounded by double-quotes. (e.g.:
+     *   '  "abcdef"')
+     *   * calendarid - The calendarid as it was passed to this function.
+     *   * size - The size of the calendar objects, in bytes.
+     *
+     * Note that the etag is optional, but it's highly encouraged to return for
+     * speed reasons.
+     *
+     * The calendardata is also optional. If it's not returned
+     * 'getCalendarObject' will be called later, which *is* expected to return
+     * calendardata.
+     *
+     * If neither etag or size are specified, the calendardata will be
+     * used/fetched to determine these numbers. If both are specified the
+     * amount of times this is needed is reduced by a great degree.
+     *
+     * @param string $calendarId
+     * @return array
+     */
+    abstract function getCalendarObjects($calendarId);
+
+    /**
+     * Returns information from a single calendar object, based on it's object
+     * uri.
      *
-     * Note that especially time-range-filters may be difficult to parse. A
-     * time-range filter specified on a VEVENT must for instance also handle
-     * recurrence rules correctly.
-     * A good example of how to interprete all these filters can also simply
-     * be found in Sabre_CalDAV_CalendarQueryFilter. This class is as correct
-     * as possible, so it gives you a good idea on what type of stuff you need
-     * to think of.
+     * The returned array must have the same keys as getCalendarObjects. The
+     * 'calendardata' object is required here though, while it's not required
+     * for getCalendarObjects.
      *
-     * @param mixed $calendarId
-     * @param array $filters
+     * @param string $calendarId
+     * @param string $objectUri
      * @return array
      */
-    public function calendarQuery($calendarId, array $filters) {
-
-        $result = array();
-        $objects = $this->getCalendarObjects($calendarId);
-
-        $validator = new Sabre_CalDAV_CalendarQueryValidator();
-
-        foreach($objects as $object) {
-
-            if ($this->validateFilterForObject($object, $filters)) {
-                $result[] = $object['uri'];
-            }
-
-        }
-
-        return $result;
-
-    }
+    abstract function getCalendarObject($calendarId,$objectUri);
 
     /**
-     * This method validates if a filters (as passed to calendarQuery) matches
-     * the given object.
+     * Creates a new calendar object.
      *
-     * @param array $object
-     * @param array $filter
-     * @return bool
+     * @param string $calendarId
+     * @param string $objectUri
+     * @param string $calendarData
+     * @return void
      */
-    protected function validateFilterForObject(array $object, array $filters) {
-
-        // Unfortunately, setting the 'calendardata' here is optional. If
-        // it was excluded, we actually need another call to get this as
-        // well.
-        if (!isset($object['calendardata'])) {
-            $object = $this->getCalendarObject($object['calendarid'], $object['uri']);
-        }
-
-        $data = is_resource($object['calendardata'])?stream_get_contents($object['calendardata']):$object['calendardata'];
-        $vObject = VObject\Reader::read($data);
+    abstract function createCalendarObject($calendarId,$objectUri,$calendarData);
 
-        $validator = new Sabre_CalDAV_CalendarQueryValidator();
-        return $validator->validate($vObject, $filters);
-
-    }
+    /**
+     * Updates an existing calendarobject, based on it's uri.
+     *
+     * @param string $calendarId
+     * @param string $objectUri
+     * @param string $calendarData
+     * @return void
+     */
+    abstract function updateCalendarObject($calendarId,$objectUri,$calendarData);
 
+    /**
+     * Deletes an existing calendar object.
+     *
+     * @param string $calendarId
+     * @param string $objectUri
+     * @return void
+     */
+    abstract function deleteCalendarObject($calendarId,$objectUri);
 
 }
diff --git a/3rdparty/Sabre/CalDAV/Backend/BackendInterface.php b/3rdparty/Sabre/CalDAV/Backend/BackendInterface.php
deleted file mode 100755
index 881538ab60e..00000000000
--- a/3rdparty/Sabre/CalDAV/Backend/BackendInterface.php
+++ /dev/null
@@ -1,231 +0,0 @@
-<?php
-
-/**
- * Every CalDAV backend must at least implement this interface.
- * 
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/) 
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-interface Sabre_CalDAV_Backend_BackendInterface {
-
-    /**
-     * Returns a list of calendars for a principal.
-     *
-     * Every project is an array with the following keys:
-     *  * id, a unique id that will be used by other functions to modify the
-     *    calendar. This can be the same as the uri or a database key.
-     *  * uri, which the basename of the uri with which the calendar is
-     *    accessed.
-     *  * principaluri. The owner of the calendar. Almost always the same as
-     *    principalUri passed to this method.
-     *
-     * Furthermore it can contain webdav properties in clark notation. A very
-     * common one is '{DAV:}displayname'.
-     *
-     * @param string $principalUri
-     * @return array
-     */
-    public function getCalendarsForUser($principalUri);
-
-    /**
-     * Creates a new calendar for a principal.
-     *
-     * If the creation was a success, an id must be returned that can be used to reference
-     * this calendar in other methods, such as updateCalendar.
-     *
-     * @param string $principalUri
-     * @param string $calendarUri
-     * @param array $properties
-     * @return void
-     */
-    public function createCalendar($principalUri,$calendarUri,array $properties);
-
-    /**
-     * Updates properties for a calendar.
-     *
-     * The mutations array uses the propertyName in clark-notation as key,
-     * and the array value for the property value. In the case a property
-     * should be deleted, the property value will be null.
-     *
-     * This method must be atomic. If one property cannot be changed, the
-     * entire operation must fail.
-     *
-     * If the operation was successful, true can be returned.
-     * If the operation failed, false can be returned.
-     *
-     * Deletion of a non-existent property is always successful.
-     *
-     * Lastly, it is optional to return detailed information about any
-     * failures. In this case an array should be returned with the following
-     * structure:
-     *
-     * array(
-     *   403 => array(
-     *      '{DAV:}displayname' => null,
-     *   ),
-     *   424 => array(
-     *      '{DAV:}owner' => null,
-     *   )
-     * )
-     *
-     * In this example it was forbidden to update {DAV:}displayname.
-     * (403 Forbidden), which in turn also caused {DAV:}owner to fail
-     * (424 Failed Dependency) because the request needs to be atomic.
-     *
-     * @param mixed $calendarId
-     * @param array $mutations
-     * @return bool|array
-     */
-    public function updateCalendar($calendarId, array $mutations); 
-
-    /**
-     * Delete a calendar and all it's objects
-     *
-     * @param mixed $calendarId
-     * @return void
-     */
-    public function deleteCalendar($calendarId);
-
-    /**
-     * Returns all calendar objects within a calendar.
-     *
-     * Every item contains an array with the following keys:
-     *   * id - unique identifier which will be used for subsequent updates
-     *   * calendardata - The iCalendar-compatible calendar data
-     *   * uri - a unique key which will be used to construct the uri. This can be any arbitrary string.
-     *   * lastmodified - a timestamp of the last modification time
-     *   * etag - An arbitrary string, surrounded by double-quotes. (e.g.:
-     *   '  "abcdef"')
-     *   * calendarid - The calendarid as it was passed to this function.
-     *   * size - The size of the calendar objects, in bytes.
-     *
-     * Note that the etag is optional, but it's highly encouraged to return for
-     * speed reasons.
-     *
-     * The calendardata is also optional. If it's not returned
-     * 'getCalendarObject' will be called later, which *is* expected to return
-     * calendardata.
-     *
-     * If neither etag or size are specified, the calendardata will be
-     * used/fetched to determine these numbers. If both are specified the
-     * amount of times this is needed is reduced by a great degree.
-     *
-     * @param mixed $calendarId
-     * @return array
-     */
-    public function getCalendarObjects($calendarId);
-
-    /**
-     * Returns information from a single calendar object, based on it's object
-     * uri.
-     *
-     * The returned array must have the same keys as getCalendarObjects. The
-     * 'calendardata' object is required here though, while it's not required
-     * for getCalendarObjects.
-     *
-     * @param mixed $calendarId
-     * @param string $objectUri
-     * @return array
-     */
-    public function getCalendarObject($calendarId,$objectUri);
-
-    /**
-     * Creates a new calendar object.
-     *
-     * It is possible return an etag from this function, which will be used in
-     * the response to this PUT request. Note that the ETag must be surrounded
-     * by double-quotes.
-     *
-     * However, you should only really return this ETag if you don't mangle the
-     * calendar-data. If the result of a subsequent GET to this object is not
-     * the exact same as this request body, you should omit the ETag.
-     *
-     * @param mixed $calendarId
-     * @param string $objectUri
-     * @param string $calendarData
-     * @return string|null
-     */
-    public function createCalendarObject($calendarId,$objectUri,$calendarData);
-
-    /**
-     * Updates an existing calendarobject, based on it's uri.
-     *
-     * It is possible return an etag from this function, which will be used in
-     * the response to this PUT request. Note that the ETag must be surrounded
-     * by double-quotes.
-     *
-     * However, you should only really return this ETag if you don't mangle the
-     * calendar-data. If the result of a subsequent GET to this object is not
-     * the exact same as this request body, you should omit the ETag.
-     *
-     * @param mixed $calendarId
-     * @param string $objectUri
-     * @param string $calendarData
-     * @return string|null
-     */
-    public function updateCalendarObject($calendarId,$objectUri,$calendarData);
-
-    /**
-     * Deletes an existing calendar object.
-     *
-     * @param mixed $calendarId
-     * @param string $objectUri
-     * @return void
-     */
-    public function deleteCalendarObject($calendarId,$objectUri);
-
-    /**
-     * Performs a calendar-query on the contents of this calendar.
-     *
-     * The calendar-query is defined in RFC4791 : CalDAV. Using the
-     * calendar-query it is possible for a client to request a specific set of
-     * object, based on contents of iCalendar properties, date-ranges and
-     * iCalendar component types (VTODO, VEVENT).
-     *
-     * This method should just return a list of (relative) urls that match this
-     * query.
-     *
-     * The list of filters are specified as an array. The exact array is
-     * documented by Sabre_CalDAV_CalendarQueryParser.
-     *
-     * Note that it is extremely likely that getCalendarObject for every path
-     * returned from this method will be called almost immediately after. You
-     * may want to anticipate this to speed up these requests.
-     *
-     * This method provides a default implementation, which parses *all* the
-     * iCalendar objects in the specified calendar.
-     *
-     * This default may well be good enough for personal use, and calendars
-     * that aren't very large. But if you anticipate high usage, big calendars
-     * or high loads, you are strongly adviced to optimize certain paths.
-     *
-     * The best way to do so is override this method and to optimize
-     * specifically for 'common filters'.
-     *
-     * Requests that are extremely common are:
-     *   * requests for just VEVENTS
-     *   * requests for just VTODO
-     *   * requests with a time-range-filter on either VEVENT or VTODO.
-     *
-     * ..and combinations of these requests. It may not be worth it to try to
-     * handle every possible situation and just rely on the (relatively
-     * easy to use) CalendarQueryValidator to handle the rest.
-     *
-     * Note that especially time-range-filters may be difficult to parse. A
-     * time-range filter specified on a VEVENT must for instance also handle
-     * recurrence rules correctly.
-     * A good example of how to interprete all these filters can also simply
-     * be found in Sabre_CalDAV_CalendarQueryFilter. This class is as correct
-     * as possible, so it gives you a good idea on what type of stuff you need
-     * to think of.
-     *
-     * @param mixed $calendarId
-     * @param array $filters
-     * @return array
-     */
-    public function calendarQuery($calendarId, array $filters); 
-
-}
diff --git a/3rdparty/Sabre/CalDAV/Backend/NotificationSupport.php b/3rdparty/Sabre/CalDAV/Backend/NotificationSupport.php
deleted file mode 100755
index d5a1409d9b9..00000000000
--- a/3rdparty/Sabre/CalDAV/Backend/NotificationSupport.php
+++ /dev/null
@@ -1,47 +0,0 @@
-<?php
-
-/**
- * Adds caldav notification support to a backend.
- *
- * Note: This feature is experimental, and may change in between different
- * SabreDAV versions.
- *
- * Notifications are defined at:
- * http://svn.calendarserver.org/repository/calendarserver/CalendarServer/trunk/doc/Extensions/caldav-notifications.txt
- *
- * These notifications are basically a list of server-generated notifications 
- * displayed to the user. Users can dismiss notifications by deleting them.
- *
- * The primary usecase is to allow for calendar-sharing.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/) 
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-interface Sabre_CalDAV_Backend_NotificationSupport extends Sabre_CalDAV_Backend_BackendInterface {
-
-    /**
-     * Returns a list of notifications for a given principal url.
-     *
-     * The returned array should only consist of implementations of
-     * Sabre_CalDAV_Notifications_INotificationType. 
-     * 
-     * @param string $principalUri
-     * @return array 
-     */
-    public function getNotificationsForPrincipal($principalUri);
-
-    /**
-     * This deletes a specific notifcation.
-     *
-     * This may be called by a client once it deems a notification handled. 
-     * 
-     * @param string $principalUri 
-     * @param Sabre_CalDAV_Notifications_INotificationType $notification 
-     * @return void
-     */
-    public function deleteNotification($principalUri, Sabre_CalDAV_Notifications_INotificationType $notification); 
-
-}
diff --git a/3rdparty/Sabre/CalDAV/Backend/PDO.php b/3rdparty/Sabre/CalDAV/Backend/PDO.php
index 447f5f590cf..ddacf940c74 100755
--- a/3rdparty/Sabre/CalDAV/Backend/PDO.php
+++ b/3rdparty/Sabre/CalDAV/Backend/PDO.php
@@ -1,7 +1,5 @@
 <?php
 
-use Sabre\VObject;
-
 /**
  * PDO CalDAV backend
  *
@@ -11,21 +9,11 @@ use Sabre\VObject;
  * @package Sabre
  * @subpackage CalDAV
  * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
+ * @author Evert Pot (http://www.rooftopsolutions.nl/) 
  * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
  */
 class Sabre_CalDAV_Backend_PDO extends Sabre_CalDAV_Backend_Abstract {
 
-    /**
-     * We need to specify a max date, because we need to stop *somewhere*
-     *
-     * On 32 bit system the maximum for a signed integer is 2147483647, so
-     * MAX_DATE cannot be higher than date('Y-m-d', 2147483647) which results
-     * in 2038-01-19 to avoid problems when the date is converted
-     * to a unix timestamp.
-     */
-    const MAX_DATE = '2038-01-01';
-
     /**
      * pdo
      *
@@ -49,9 +37,8 @@ class Sabre_CalDAV_Backend_PDO extends Sabre_CalDAV_Backend_Abstract {
 
     /**
      * List of CalDAV properties, and how they map to database fieldnames
-     * Add your own properties by simply adding on to this array.
      *
-     * Note that only string-based properties are supported here.
+     * Add your own properties by simply adding on to this array
      *
      * @var array
      */
@@ -103,7 +90,6 @@ class Sabre_CalDAV_Backend_PDO extends Sabre_CalDAV_Backend_Abstract {
         $fields[] = 'ctag';
         $fields[] = 'components';
         $fields[] = 'principaluri';
-        $fields[] = 'transparent';
 
         // Making fields a comma-delimited list
         $fields = implode(', ', $fields);
@@ -124,7 +110,6 @@ class Sabre_CalDAV_Backend_PDO extends Sabre_CalDAV_Backend_Abstract {
                 'principaluri' => $row['principaluri'],
                 '{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}getctag' => $row['ctag']?$row['ctag']:'0',
                 '{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}supported-calendar-component-set' => new Sabre_CalDAV_Property_SupportedCalendarComponentSet($components),
-                '{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}schedule-calendar-transp' => new Sabre_CalDAV_Property_ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
             );
 
 
@@ -157,13 +142,11 @@ class Sabre_CalDAV_Backend_PDO extends Sabre_CalDAV_Backend_Abstract {
             'principaluri',
             'uri',
             'ctag',
-            'transparent',
         );
         $values = array(
             ':principaluri' => $principalUri,
             ':uri'          => $calendarUri,
             ':ctag'         => 1,
-            ':transparent'  => 0,
         );
 
         // Default value
@@ -177,10 +160,6 @@ class Sabre_CalDAV_Backend_PDO extends Sabre_CalDAV_Backend_Abstract {
             }
             $values[':components'] = implode(',',$properties[$sccs]->getValue());
         }
-        $transp = '{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}schedule-calendar-transp';
-        if (isset($properties[$transp])) {
-            $values[':transparent'] = $properties[$transp]->getValue()==='transparent';
-        }
 
         foreach($this->propertyMap as $xmlName=>$dbName) {
             if (isset($properties[$xmlName])) {
@@ -246,25 +225,17 @@ class Sabre_CalDAV_Backend_PDO extends Sabre_CalDAV_Backend_Abstract {
 
         foreach($mutations as $propertyName=>$propertyValue) {
 
-            switch($propertyName) {
-                case '{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}schedule-calendar-transp' :
-                    $fieldName = 'transparent';
-                    $newValues[$fieldName] = $propertyValue->getValue()==='transparent';
-                    break;
-                default :
-                    // Checking the property map
-                    if (!isset($this->propertyMap[$propertyName])) {
-                        // We don't know about this property.
-                        $hasError = true;
-                        $result[403][$propertyName] = null;
-                        unset($mutations[$propertyName]);
-                        continue;
-                    }
-
-                    $fieldName = $this->propertyMap[$propertyName];
-                    $newValues[$fieldName] = $propertyValue;
+            // We don't know about this property.
+            if (!isset($this->propertyMap[$propertyName])) {
+                $hasError = true;
+                $result[403][$propertyName] = null;
+                unset($mutations[$propertyName]);
+                continue;
             }
 
+            $fieldName = $this->propertyMap[$propertyName];
+            $newValues[$fieldName] = $propertyValue;
+
         }
 
         // If there were any errors we need to fail the request
@@ -345,22 +316,9 @@ class Sabre_CalDAV_Backend_PDO extends Sabre_CalDAV_Backend_Abstract {
      */
     public function getCalendarObjects($calendarId) {
 
-        $stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size FROM '.$this->calendarObjectTableName.' WHERE calendarid = ?');
+        $stmt = $this->pdo->prepare('SELECT * FROM '.$this->calendarObjectTableName.' WHERE calendarid = ?');
         $stmt->execute(array($calendarId));
-
-        $result = array();
-        foreach($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
-            $result[] = array(
-                'id'           => $row['id'],
-                'uri'          => $row['uri'],
-                'lastmodified' => $row['lastmodified'],
-                'etag'         => '"' . $row['etag'] . '"',
-                'calendarid'   => $row['calendarid'],
-                'size'         => (int)$row['size'],
-            );
-        }
-
-        return $result;
+        return $stmt->fetchAll();
 
     }
 
@@ -378,166 +336,44 @@ class Sabre_CalDAV_Backend_PDO extends Sabre_CalDAV_Backend_Abstract {
      */
     public function getCalendarObject($calendarId,$objectUri) {
 
-        $stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size, calendardata FROM '.$this->calendarObjectTableName.' WHERE calendarid = ? AND uri = ?');
+        $stmt = $this->pdo->prepare('SELECT * FROM '.$this->calendarObjectTableName.' WHERE calendarid = ? AND uri = ?');
         $stmt->execute(array($calendarId, $objectUri));
-        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
-
-        if(!$row) return null;
-
-        return array(
-            'id'           => $row['id'],
-            'uri'          => $row['uri'],
-            'lastmodified' => $row['lastmodified'],
-            'etag'         => '"' . $row['etag'] . '"',
-            'calendarid'   => $row['calendarid'],
-            'size'         => (int)$row['size'],
-            'calendardata' => $row['calendardata'],
-         );
+        return $stmt->fetch();
 
     }
 
-
     /**
      * Creates a new calendar object.
      *
-     * It is possible return an etag from this function, which will be used in
-     * the response to this PUT request. Note that the ETag must be surrounded
-     * by double-quotes.
-     *
-     * However, you should only really return this ETag if you don't mangle the
-     * calendar-data. If the result of a subsequent GET to this object is not
-     * the exact same as this request body, you should omit the ETag.
-     *
-     * @param mixed $calendarId
+     * @param string $calendarId
      * @param string $objectUri
      * @param string $calendarData
-     * @return string|null
+     * @return void
      */
     public function createCalendarObject($calendarId,$objectUri,$calendarData) {
 
-        $extraData = $this->getDenormalizedData($calendarData);
-
-        $stmt = $this->pdo->prepare('INSERT INTO '.$this->calendarObjectTableName.' (calendarid, uri, calendardata, lastmodified, etag, size, componenttype, firstoccurence, lastoccurence) VALUES (?,?,?,?,?,?,?,?,?)');
-        $stmt->execute(array(
-            $calendarId,
-            $objectUri,
-            $calendarData,
-            time(),
-            $extraData['etag'],
-            $extraData['size'],
-            $extraData['componentType'],
-            $extraData['firstOccurence'],
-            $extraData['lastOccurence'],
-        ));
+        $stmt = $this->pdo->prepare('INSERT INTO '.$this->calendarObjectTableName.' (calendarid, uri, calendardata, lastmodified) VALUES (?,?,?,?)');
+        $stmt->execute(array($calendarId,$objectUri,$calendarData,time()));
         $stmt = $this->pdo->prepare('UPDATE '.$this->calendarTableName.' SET ctag = ctag + 1 WHERE id = ?');
         $stmt->execute(array($calendarId));
 
-        return '"' . $extraData['etag'] . '"';
-
     }
 
     /**
      * Updates an existing calendarobject, based on it's uri.
      *
-     * It is possible return an etag from this function, which will be used in
-     * the response to this PUT request. Note that the ETag must be surrounded
-     * by double-quotes.
-     *
-     * However, you should only really return this ETag if you don't mangle the
-     * calendar-data. If the result of a subsequent GET to this object is not
-     * the exact same as this request body, you should omit the ETag.
-     *
-     * @param mixed $calendarId
+     * @param string $calendarId
      * @param string $objectUri
      * @param string $calendarData
-     * @return string|null
+     * @return void
      */
     public function updateCalendarObject($calendarId,$objectUri,$calendarData) {
 
-        $extraData = $this->getDenormalizedData($calendarData);
-
-        $stmt = $this->pdo->prepare('UPDATE '.$this->calendarObjectTableName.' SET calendardata = ?, lastmodified = ?, etag = ?, size = ?, componenttype = ?, firstoccurence = ?, lastoccurence = ? WHERE calendarid = ? AND uri = ?');
-        $stmt->execute(array($calendarData,time(), $extraData['etag'], $extraData['size'], $extraData['componentType'], $extraData['firstOccurence'], $extraData['lastOccurence'] ,$calendarId,$objectUri));
+        $stmt = $this->pdo->prepare('UPDATE '.$this->calendarObjectTableName.' SET calendardata = ?, lastmodified = ? WHERE calendarid = ? AND uri = ?');
+        $stmt->execute(array($calendarData,time(),$calendarId,$objectUri));
         $stmt = $this->pdo->prepare('UPDATE '.$this->calendarTableName.' SET ctag = ctag + 1 WHERE id = ?');
         $stmt->execute(array($calendarId));
 
-        return '"' . $extraData['etag'] . '"';
-
-    }
-
-    /**
-     * Parses some information from calendar objects, used for optimized
-     * calendar-queries.
-     *
-     * Returns an array with the following keys:
-     *   * etag
-     *   * size
-     *   * componentType
-     *   * firstOccurence
-     *   * lastOccurence
-     *
-     * @param string $calendarData
-     * @return array
-     */
-    protected function getDenormalizedData($calendarData) {
-
-        $vObject = VObject\Reader::read($calendarData);
-        $componentType = null;
-        $component = null;
-        $firstOccurence = null;
-        $lastOccurence = null;
-        foreach($vObject->getComponents() as $component) {
-            if ($component->name!=='VTIMEZONE') {
-                $componentType = $component->name;
-                break;
-            }
-        }
-        if (!$componentType) {
-            throw new Sabre_DAV_Exception_BadRequest('Calendar objects must have a VJOURNAL, VEVENT or VTODO component');
-        }
-        if ($componentType === 'VEVENT') {
-            $firstOccurence = $component->DTSTART->getDateTime()->getTimeStamp();
-            // Finding the last occurence is a bit harder
-            if (!isset($component->RRULE)) {
-                if (isset($component->DTEND)) {
-                    $lastOccurence = $component->DTEND->getDateTime()->getTimeStamp();
-                } elseif (isset($component->DURATION)) {
-                    $endDate = clone $component->DTSTART->getDateTime();
-                    $endDate->add(VObject\DateTimeParser::parse($component->DURATION->value));
-                    $lastOccurence = $endDate->getTimeStamp();
-                } elseif ($component->DTSTART->getDateType()===VObject\Property\DateTime::DATE) {
-                    $endDate = clone $component->DTSTART->getDateTime();
-                    $endDate->modify('+1 day');
-                    $lastOccurence = $endDate->getTimeStamp();
-                } else {
-                    $lastOccurence = $firstOccurence;
-                }
-            } else {
-                $it = new VObject\RecurrenceIterator($vObject, (string)$component->UID);
-                $maxDate = new DateTime(self::MAX_DATE);
-                if ($it->isInfinite()) {
-                    $lastOccurence = $maxDate->getTimeStamp();
-                } else {
-                    $end = $it->getDtEnd();
-                    while($it->valid() && $end < $maxDate) {
-                        $end = $it->getDtEnd();
-                        $it->next();
-
-                    }
-                    $lastOccurence = $end->getTimeStamp();
-                }
-
-            }
-        }
-
-        return array(
-            'etag' => md5($calendarData),
-            'size' => strlen($calendarData),
-            'componentType' => $componentType,
-            'firstOccurence' => $firstOccurence,
-            'lastOccurence'  => $lastOccurence,
-        );
-
     }
 
     /**
@@ -556,132 +392,5 @@ class Sabre_CalDAV_Backend_PDO extends Sabre_CalDAV_Backend_Abstract {
 
     }
 
-    /**
-     * Performs a calendar-query on the contents of this calendar.
-     *
-     * The calendar-query is defined in RFC4791 : CalDAV. Using the
-     * calendar-query it is possible for a client to request a specific set of
-     * object, based on contents of iCalendar properties, date-ranges and
-     * iCalendar component types (VTODO, VEVENT).
-     *
-     * This method should just return a list of (relative) urls that match this
-     * query.
-     *
-     * The list of filters are specified as an array. The exact array is
-     * documented by Sabre_CalDAV_CalendarQueryParser.
-     *
-     * Note that it is extremely likely that getCalendarObject for every path
-     * returned from this method will be called almost immediately after. You
-     * may want to anticipate this to speed up these requests.
-     *
-     * This method provides a default implementation, which parses *all* the
-     * iCalendar objects in the specified calendar.
-     *
-     * This default may well be good enough for personal use, and calendars
-     * that aren't very large. But if you anticipate high usage, big calendars
-     * or high loads, you are strongly adviced to optimize certain paths.
-     *
-     * The best way to do so is override this method and to optimize
-     * specifically for 'common filters'.
-     *
-     * Requests that are extremely common are:
-     *   * requests for just VEVENTS
-     *   * requests for just VTODO
-     *   * requests with a time-range-filter on a VEVENT.
-     *
-     * ..and combinations of these requests. It may not be worth it to try to
-     * handle every possible situation and just rely on the (relatively
-     * easy to use) CalendarQueryValidator to handle the rest.
-     *
-     * Note that especially time-range-filters may be difficult to parse. A
-     * time-range filter specified on a VEVENT must for instance also handle
-     * recurrence rules correctly.
-     * A good example of how to interprete all these filters can also simply
-     * be found in Sabre_CalDAV_CalendarQueryFilter. This class is as correct
-     * as possible, so it gives you a good idea on what type of stuff you need
-     * to think of.
-     *
-     * This specific implementation (for the PDO) backend optimizes filters on
-     * specific components, and VEVENT time-ranges.
-     *
-     * @param string $calendarId
-     * @param array $filters
-     * @return array
-     */
-    public function calendarQuery($calendarId, array $filters) {
-
-        $result = array();
-        $validator = new Sabre_CalDAV_CalendarQueryValidator();
-
-        $componentType = null;
-        $requirePostFilter = true;
-        $timeRange = null;
-
-        // if no filters were specified, we don't need to filter after a query
-        if (!$filters['prop-filters'] && !$filters['comp-filters']) {
-            $requirePostFilter = false;
-        }
-
-        // Figuring out if there's a component filter
-        if (count($filters['comp-filters']) > 0 && !$filters['comp-filters'][0]['is-not-defined']) {
-            $componentType = $filters['comp-filters'][0]['name'];
-
-            // Checking if we need post-filters
-            if (!$filters['prop-filters'] && !$filters['comp-filters'][0]['comp-filters'] && !$filters['comp-filters'][0]['time-range'] && !$filters['comp-filters'][0]['prop-filters']) {
-                $requirePostFilter = false;
-            }
-            // There was a time-range filter
-            if ($componentType == 'VEVENT' && isset($filters['comp-filters'][0]['time-range'])) {
-                $timeRange = $filters['comp-filters'][0]['time-range'];
-
-                // If start time OR the end time is not specified, we can do a
-                // 100% accurate mysql query.
-                if (!$filters['prop-filters'] && !$filters['comp-filters'][0]['comp-filters'] && !$filters['comp-filters'][0]['prop-filters'] && (!$timeRange['start'] || !$timeRange['end'])) {
-                    $requirePostFilter = false;
-                }
-            }
 
-        }
-
-        if ($requirePostFilter) {
-            $query = "SELECT uri, calendardata FROM ".$this->calendarObjectTableName." WHERE calendarid = :calendarid";
-        } else {
-            $query = "SELECT uri FROM ".$this->calendarObjectTableName." WHERE calendarid = :calendarid";
-        }
-
-        $values = array(
-            'calendarid' => $calendarId,
-        );
-
-        if ($componentType) {
-            $query.=" AND componenttype = :componenttype";
-            $values['componenttype'] = $componentType;
-        }
-
-        if ($timeRange && $timeRange['start']) {
-            $query.=" AND lastoccurence > :startdate";
-            $values['startdate'] = $timeRange['start']->getTimeStamp();
-        }
-        if ($timeRange && $timeRange['end']) {
-            $query.=" AND firstoccurence < :enddate";
-            $values['enddate'] = $timeRange['end']->getTimeStamp();
-        }
-
-        $stmt = $this->pdo->prepare($query);
-        $stmt->execute($values);
-
-        $result = array();
-        while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-            if ($requirePostFilter) {
-                if (!$this->validateFilterForObject($row, $filters)) {
-                    continue;
-                }
-            }
-            $result[] = $row['uri'];
-
-        }
-
-        return $result;
-
-    }
 }
diff --git a/3rdparty/Sabre/CalDAV/Backend/SharingSupport.php b/3rdparty/Sabre/CalDAV/Backend/SharingSupport.php
deleted file mode 100755
index f73f0ff3d8a..00000000000
--- a/3rdparty/Sabre/CalDAV/Backend/SharingSupport.php
+++ /dev/null
@@ -1,238 +0,0 @@
-<?php
-
-/**
- * Adds support for sharing features to a CalDAV server.
- *
- * Note: This feature is experimental, and may change in between different
- * SabreDAV versions.
- *
- * Early warning: Currently SabreDAV provides no implementation for this. This
- * is, because in it's current state there is no elegant way to do this.
- * The problem lies in the fact that a real CalDAV server with sharing support
- * would first need email support (with invite notifications), and really also
- * a browser-frontend that allows people to accept or reject these shares.
- *
- * In addition, the CalDAV backends are currently kept as independent as
- * possible, and should not be aware of principals, email addresses or
- * accounts.
- *
- * Adding an implementation for Sharing to standard-sabredav would contradict
- * these goals, so for this reason this is currently not implemented, although
- * it may very well in the future; but probably not before SabreDAV 2.0.
- *
- * The interface works however, so if you implement all this, and do it
- * correctly sharing _will_ work. It's not particularly easy, and I _urge you_
- * to make yourself acquainted with the following document first:
- *
- * https://trac.calendarserver.org/browser/CalendarServer/trunk/doc/Extensions/caldav-sharing.txt
- *
- * An overview
- * ===========
- *
- * Implementing this interface will allow a user to share his or her calendars
- * to other users. Effectively, when a calendar is shared the calendar will
- * show up in both the Sharer's and Sharee's calendar-home root.
- * This interface adds a few methods that ensure that this happens, and there
- * are also a number of new requirements in the base-class you must now follow.
- *
- *
- * How it works
- * ============
- *
- * When a user shares a calendar, the addShare() method will be called with a
- * list of sharees that are now added, and a list of sharees that have been
- * removed.
- * Removal is instant, but when a sharee is added the sharee first gets a
- * chance to accept or reject the invitation for a share.
- *
- * After a share is accepted, the calendar will be returned from
- * getUserCalendars for both the sharer, and the sharee.
- *
- * If the sharee deletes the calendar, only their share gets deleted. When the
- * owner deletes a calendar, it will be removed for everybody.
- *
- *
- * Notifications
- * =============
- *
- * During all these sharing operations, a lot of notifications are sent back
- * and forward.
- *
- * Whenever the list of sharees for a calendar has been changed (they have been
- * added, removed or modified) all sharees should get a notification for this
- * change.
- * This notification is always represented by:
- *
- * Sabre_CalDAV_Notifications_Notification_Invite
- *
- * In the case of an invite, the sharee may reply with an 'accept' or
- * 'decline'. These are always represented by:
- *
- * Sabre_CalDAV_Notifications_Notification_Invite
- *
- *
- * Calendar access by sharees
- * ==========================
- *
- * As mentioned earlier, shared calendars must now also be returned for
- * getCalendarsForUser for sharees. A few things change though.
- *
- * The following properties must be specified:
- *
- * 1. {http://calendarserver.org/ns/}shared-url
- *
- * This property MUST contain the url to the original calendar, that is.. the
- * path to the calendar from the owner.
- *
- * 2. {http://sabredav.org/ns}owner-principal
- *
- * This is a url to to the principal who is sharing the calendar.
- *
- * 3. {http://sabredav.org/ns}read-only
- *
- * This should be either 0 or 1, depending on if the user has read-only or
- * read-write access to the calendar.
- *
- * Only when this is done, the calendar will correctly be marked as a calendar
- * that's shared to him, thus allowing clients to display the correct interface
- * and ACL enforcement.
- *
- * If a sharee deletes their calendar, only their instance of the calendar
- * should be deleted, the original should still exists.
- * Pretty much any 'dead' WebDAV properties on these shared calendars should be
- * specific to a user. This means that if the displayname is changed by a
- * sharee, the original is not affected. This is also true for:
- *   * The description
- *   * The color
- *   * The order
- *   * And any other dead properties.
- *
- * Properties like a ctag should not be different for multiple instances of the
- * calendar.
- *
- * Lastly, objects *within* calendars should also have user-specific data. The
- * two things that are user-specific are:
- *   * VALARM objects
- *   * The TRANSP property
- *
- * This _also_ implies that if a VALARM is deleted by a sharee for some event,
- * this has no effect on the original VALARM.
- *
- * Understandably, the this last requirement is one of the hardest.
- * Realisticly, I can see people ignoring this part of the spec, but that could
- * cause a different set of issues.
- *
- *
- * Publishing
- * ==========
- *
- * When a user publishes a url, the server should generate a 'publish url'.
- * This is a read-only url, anybody can use to consume the calendar feed.
- *
- * Calendars are in one of two states:
- *   * published
- *   * unpublished
- *
- * If a calendar is published, the following property should be returned
- * for each calendar in getCalendarsForPrincipal.
- *
- * {http://calendarserver.org/ns/}publish-url
- *
- * This element should contain a {DAV:}href element, which points to the
- * public url that does not require authentication. Unlike every other href,
- * this url must be absolute.
- *
- * Ideally, the following property is always returned
- *
- * {http://calendarserver.org/ns/}pre-publish-url
- *
- * This property should contain the url that the calendar _would_ have, if it
- * were to be published. iCal uses this to display the url, before the user
- * will actually publish it.
- *
- *
- * Selectively disabling publish or share feature
- * ==============================================
- *
- * If Sabre_CalDAV_Property_AllowedSharingModes is returned from
- * getCalendarsByUser, this allows the server to specify wether either sharing,
- * or publishing is supported.
- *
- * This allows a client to determine in advance which features are available,
- * and update the interface appropriately. If this property is not returned by
- * the backend, the SharingPlugin automatically injects it and assumes both
- * features are available.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-interface Sabre_CalDAV_Backend_SharingSupport extends Sabre_CalDAV_Backend_NotificationSupport {
-
-    /**
-     * Updates the list of shares.
-     *
-     * The first array is a list of people that are to be added to the
-     * calendar.
-     *
-     * Every element in the add array has the following properties:
-     *   * href - A url. Usually a mailto: address
-     *   * commonName - Usually a first and last name, or false
-     *   * summary - A description of the share, can also be false
-     *   * readOnly - A boolean value
-     *
-     * Every element in the remove array is just the address string.
-     *
-     * Note that if the calendar is currently marked as 'not shared' by and
-     * this method is called, the calendar should be 'upgraded' to a shared
-     * calendar.
-     *
-     * @param mixed $calendarId
-     * @param array $add
-     * @param array $remove
-     * @return void
-     */
-    function updateShares($calendarId, array $add, array $remove);
-
-    /**
-     * Returns the list of people whom this calendar is shared with.
-     *
-     * Every element in this array should have the following properties:
-     *   * href - Often a mailto: address
-     *   * commonName - Optional, for example a first + last name
-     *   * status - See the Sabre_CalDAV_SharingPlugin::STATUS_ constants.
-     *   * readOnly - boolean
-     *   * summary - Optional, a description for the share
-     *
-     * @param mixed $calendarId
-     * @return array
-     */
-    function getShares($calendarId);
-
-    /**
-     * This method is called when a user replied to a request to share.
-     *
-     * If the user chose to accept the share, this method should return the
-     * newly created calendar url.
-     *
-     * @param string href The sharee who is replying (often a mailto: address)
-     * @param int status One of the SharingPlugin::STATUS_* constants
-     * @param string $calendarUri The url to the calendar thats being shared
-     * @param string $inReplyTo The unique id this message is a response to
-     * @param string $summary A description of the reply
-     * @return null|string
-     */
-    function shareReply($href, $status, $calendarUri, $inReplyTo, $summary = null);
-
-    /**
-     * Publishes a calendar
-     *
-     * @param mixed $calendarId
-     * @param bool $value
-     * @return void
-     */
-    function setPublishStatus($calendarId, $value);
-
-}
diff --git a/3rdparty/Sabre/CalDAV/Calendar.php b/3rdparty/Sabre/CalDAV/Calendar.php
index 63253febd5c..623df2dd1b8 100755
--- a/3rdparty/Sabre/CalDAV/Calendar.php
+++ b/3rdparty/Sabre/CalDAV/Calendar.php
@@ -9,7 +9,7 @@
  * @package Sabre
  * @subpackage CalDAV
  * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
+ * @author Evert Pot (http://www.rooftopsolutions.nl/) 
  * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
  */
 class Sabre_CalDAV_Calendar implements Sabre_CalDAV_ICalendar, Sabre_DAV_IProperties, Sabre_DAVACL_IACL {
@@ -24,7 +24,7 @@ class Sabre_CalDAV_Calendar implements Sabre_CalDAV_ICalendar, Sabre_DAV_IProper
     /**
      * CalDAV backend
      *
-     * @var Sabre_CalDAV_Backend_BackendInterface
+     * @var Sabre_CalDAV_Backend_Abstract
      */
     protected $caldavBackend;
 
@@ -39,15 +39,16 @@ class Sabre_CalDAV_Calendar implements Sabre_CalDAV_ICalendar, Sabre_DAV_IProper
      * Constructor
      *
      * @param Sabre_DAVACL_IPrincipalBackend $principalBackend
-     * @param Sabre_CalDAV_Backend_BackendInterface $caldavBackend
+     * @param Sabre_CalDAV_Backend_Abstract $caldavBackend
      * @param array $calendarInfo
      */
-    public function __construct(Sabre_DAVACL_IPrincipalBackend $principalBackend, Sabre_CalDAV_Backend_BackendInterface $caldavBackend, $calendarInfo) {
+    public function __construct(Sabre_DAVACL_IPrincipalBackend $principalBackend, Sabre_CalDAV_Backend_Abstract $caldavBackend, $calendarInfo) {
 
         $this->caldavBackend = $caldavBackend;
         $this->principalBackend = $principalBackend;
         $this->calendarInfo = $calendarInfo;
 
+
     }
 
     /**
@@ -91,6 +92,9 @@ class Sabre_CalDAV_Calendar implements Sabre_CalDAV_ICalendar, Sabre_DAV_IProper
             case '{urn:ietf:params:xml:ns:caldav}supported-collation-set' :
                 $response[$prop] =  new Sabre_CalDAV_Property_SupportedCollationSet();
                 break;
+            case '{DAV:}owner' :
+                $response[$prop] = new Sabre_DAVACL_Property_Principal(Sabre_DAVACL_Property_Principal::HREF,$this->calendarInfo['principaluri']);
+                break;
             default :
                 if (isset($this->calendarInfo[$prop])) $response[$prop] = $this->calendarInfo[$prop];
                 break;
@@ -106,21 +110,12 @@ class Sabre_CalDAV_Calendar implements Sabre_CalDAV_ICalendar, Sabre_DAV_IProper
      * The contained calendar objects are for example Events or Todo's.
      *
      * @param string $name
-     * @return Sabre_CalDAV_ICalendarObject
+     * @return Sabre_DAV_ICalendarObject
      */
     public function getChild($name) {
 
         $obj = $this->caldavBackend->getCalendarObject($this->calendarInfo['id'],$name);
         if (!$obj) throw new Sabre_DAV_Exception_NotFound('Calendar object not found');
-
-        $obj['acl'] = $this->getACL();
-        // Removing the irrelivant
-        foreach($obj['acl'] as $key=>$acl) {
-            if ($acl['privilege'] === '{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}read-free-busy') {
-                unset($obj['acl'][$key]);
-            }
-        }
-
         return new Sabre_CalDAV_CalendarObject($this->caldavBackend,$this->calendarInfo,$obj);
 
     }
@@ -135,13 +130,6 @@ class Sabre_CalDAV_Calendar implements Sabre_CalDAV_ICalendar, Sabre_DAV_IProper
         $objs = $this->caldavBackend->getCalendarObjects($this->calendarInfo['id']);
         $children = array();
         foreach($objs as $obj) {
-            $obj['acl'] = $this->getACL();
-            // Removing the irrelivant
-            foreach($obj['acl'] as $key=>$acl) {
-                if ($acl['privilege'] === '{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}read-free-busy') {
-                    unset($obj['acl'][$key]);
-                }
-            }
             $children[] = new Sabre_CalDAV_CalendarObject($this->caldavBackend,$this->calendarInfo,$obj);
         }
         return $children;
@@ -274,27 +262,27 @@ class Sabre_CalDAV_Calendar implements Sabre_CalDAV_ICalendar, Sabre_DAV_IProper
         return array(
             array(
                 'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner(),
+                'principal' => $this->calendarInfo['principaluri'],
                 'protected' => true,
             ),
             array(
                 'privilege' => '{DAV:}write',
-                'principal' => $this->getOwner(),
+                'principal' => $this->calendarInfo['principaluri'],
                 'protected' => true,
             ),
             array(
                 'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
                 'protected' => true,
             ),
             array(
                 'privilege' => '{DAV:}write',
-                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
                 'protected' => true,
             ),
             array(
                 'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner() . '/calendar-proxy-read',
+                'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-read',
                 'protected' => true,
             ),
             array(
@@ -352,27 +340,4 @@ class Sabre_CalDAV_Calendar implements Sabre_CalDAV_ICalendar, Sabre_DAV_IProper
 
     }
 
-    /**
-     * Performs a calendar-query on the contents of this calendar.
-     *
-     * The calendar-query is defined in RFC4791 : CalDAV. Using the
-     * calendar-query it is possible for a client to request a specific set of
-     * object, based on contents of iCalendar properties, date-ranges and
-     * iCalendar component types (VTODO, VEVENT).
-     *
-     * This method should just return a list of (relative) urls that match this
-     * query.
-     *
-     * The list of filters are specified as an array. The exact array is
-     * documented by Sabre_CalDAV_CalendarQueryParser.
-     *
-     * @param array $filters
-     * @return array
-     */
-    public function calendarQuery(array $filters) {
-
-        return $this->caldavBackend->calendarQuery($this->calendarInfo['id'], $filters);
-
-    }
-
 }
diff --git a/3rdparty/Sabre/CalDAV/CalendarObject.php b/3rdparty/Sabre/CalDAV/CalendarObject.php
index 40bd8588c70..72f0a578d16 100755
--- a/3rdparty/Sabre/CalDAV/CalendarObject.php
+++ b/3rdparty/Sabre/CalDAV/CalendarObject.php
@@ -6,13 +6,13 @@
  * @package Sabre
  * @subpackage CalDAV
  * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
+ * @author Evert Pot (http://www.rooftopsolutions.nl/) 
  * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
  */
 class Sabre_CalDAV_CalendarObject extends Sabre_DAV_File implements Sabre_CalDAV_ICalendarObject, Sabre_DAVACL_IACL {
 
     /**
-     * Sabre_CalDAV_Backend_BackendInterface
+     * Sabre_CalDAV_Backend_Abstract
      *
      * @var array
      */
@@ -35,11 +35,11 @@ class Sabre_CalDAV_CalendarObject extends Sabre_DAV_File implements Sabre_CalDAV
     /**
      * Constructor
      *
-     * @param Sabre_CalDAV_Backend_BackendInterface $caldavBackend
+     * @param Sabre_CalDAV_Backend_Abstract $caldavBackend
      * @param array $calendarInfo
      * @param array $objectData
      */
-    public function __construct(Sabre_CalDAV_Backend_BackendInterface $caldavBackend,array $calendarInfo,array $objectData) {
+    public function __construct(Sabre_CalDAV_Backend_Abstract $caldavBackend,array $calendarInfo,array $objectData) {
 
         $this->caldavBackend = $caldavBackend;
 
@@ -85,8 +85,8 @@ class Sabre_CalDAV_CalendarObject extends Sabre_DAV_File implements Sabre_CalDAV
     /**
      * Updates the ICalendar-formatted object
      *
-     * @param string|resource $calendarData
-     * @return string
+     * @param string $calendarData
+     * @return void
      */
     public function put($calendarData) {
 
@@ -119,7 +119,7 @@ class Sabre_CalDAV_CalendarObject extends Sabre_DAV_File implements Sabre_CalDAV
      */
     public function getContentType() {
 
-        return 'text/calendar; charset=utf-8';
+        return 'text/calendar';
 
     }
 
@@ -143,7 +143,7 @@ class Sabre_CalDAV_CalendarObject extends Sabre_DAV_File implements Sabre_CalDAV
     /**
      * Returns the last modification date as a unix timestamp
      *
-     * @return int
+     * @return time
      */
     public function getLastModified() {
 
@@ -206,12 +206,6 @@ class Sabre_CalDAV_CalendarObject extends Sabre_DAV_File implements Sabre_CalDAV
      */
     public function getACL() {
 
-        // An alternative acl may be specified in the object data.
-        if (isset($this->objectData['acl'])) {
-            return $this->objectData['acl'];
-        }
-
-        // The default ACL
         return array(
             array(
                 'privilege' => '{DAV:}read',
diff --git a/3rdparty/Sabre/CalDAV/CalendarQueryParser.php b/3rdparty/Sabre/CalDAV/CalendarQueryParser.php
index b95095f96fc..bd0d343382f 100755
--- a/3rdparty/Sabre/CalDAV/CalendarQueryParser.php
+++ b/3rdparty/Sabre/CalDAV/CalendarQueryParser.php
@@ -1,7 +1,5 @@
 <?php
 
-use Sabre\VObject;
-
 /**
  * Parses the calendar-query report request body.
  *
@@ -70,7 +68,7 @@ class Sabre_CalDAV_CalendarQueryParser {
 
         $this->xpath = new DOMXPath($dom);
         $this->xpath->registerNameSpace('cal',Sabre_CalDAV_Plugin::NS_CALDAV);
-        $this->xpath->registerNameSpace('dav','DAV:');
+        $this->xpath->registerNameSpace('dav','urn:DAV');
 
     }
 
@@ -243,12 +241,12 @@ class Sabre_CalDAV_CalendarQueryParser {
         $timeRangeNode = $timeRangeNodes->item(0);
 
         if ($start = $timeRangeNode->getAttribute('start')) {
-            $start = VObject\DateTimeParser::parseDateTime($start);
+            $start = Sabre_VObject_DateTimeParser::parseDateTime($start);
         } else {
             $start = null;
         }
         if ($end = $timeRangeNode->getAttribute('end')) {
-            $end = VObject\DateTimeParser::parseDateTime($end);
+            $end = Sabre_VObject_DateTimeParser::parseDateTime($end);
         } else {
             $end = null;
         }
@@ -276,13 +274,13 @@ class Sabre_CalDAV_CalendarQueryParser {
         if(!$start) {
             throw new Sabre_DAV_Exception_BadRequest('The "start" attribute is required for the CALDAV:expand element');
         } 
-        $start = VObject\DateTimeParser::parseDateTime($start);
+        $start = Sabre_VObject_DateTimeParser::parseDateTime($start);
 
         $end = $parentNode->getAttribute('end');
         if(!$end) {
             throw new Sabre_DAV_Exception_BadRequest('The "end" attribute is required for the CALDAV:expand element');
         } 
-        $end = VObject\DateTimeParser::parseDateTime($end);
+        $end = Sabre_VObject_DateTimeParser::parseDateTime($end);
         
         if ($end <= $start) {
             throw new Sabre_DAV_Exception_BadRequest('The end-date must be larger than the start-date in the expand element.');
diff --git a/3rdparty/Sabre/CalDAV/CalendarQueryValidator.php b/3rdparty/Sabre/CalDAV/CalendarQueryValidator.php
index 53e86fc509f..8f674840e87 100755
--- a/3rdparty/Sabre/CalDAV/CalendarQueryValidator.php
+++ b/3rdparty/Sabre/CalDAV/CalendarQueryValidator.php
@@ -1,7 +1,5 @@
 <?php
 
-use Sabre\VObject;
-
 /**
  * CalendarQuery Validator
  *
@@ -24,11 +22,11 @@ class Sabre_CalDAV_CalendarQueryValidator {
      *
      * The list of filters must be formatted as parsed by Sabre_CalDAV_CalendarQueryParser
      *
-     * @param VObject\Component $vObject
+     * @param Sabre_VObject_Component $vObject
      * @param array $filters
      * @return bool
      */
-    public function validate(VObject\Component $vObject,array $filters) {
+    public function validate(Sabre_VObject_Component $vObject,array $filters) {
 
         // The top level object is always a component filter.
         // We'll parse it manually, as it's pretty simple.
@@ -50,11 +48,11 @@ class Sabre_CalDAV_CalendarQueryValidator {
      * component we're checking should be specified, not the component to check
      * itself.
      *
-     * @param VObject\Component $parent
+     * @param Sabre_VObject_Component $parent
      * @param array $filters
      * @return bool
      */
-    protected function validateCompFilters(VObject\Component $parent, array $filters) {
+    protected function validateCompFilters(Sabre_VObject_Component $parent, array $filters) {
 
         foreach($filters as $filter) {
 
@@ -119,11 +117,11 @@ class Sabre_CalDAV_CalendarQueryValidator {
      * property we're checking should be specified, not the property to check
      * itself.
      *
-     * @param VObject\Component $parent
+     * @param Sabre_VObject_Component $parent
      * @param array $filters
      * @return bool
      */
-    protected function validatePropFilters(VObject\Component $parent, array $filters) {
+    protected function validatePropFilters(Sabre_VObject_Component $parent, array $filters) {
 
         foreach($filters as $filter) {
 
@@ -189,11 +187,11 @@ class Sabre_CalDAV_CalendarQueryValidator {
      * parameter we're checking should be specified, not the parameter to check
      * itself.
      *
-     * @param VObject\Property $parent
+     * @param Sabre_VObject_Property $parent
      * @param array $filters
      * @return bool
      */
-    protected function validateParamFilters(VObject\Property $parent, array $filters) {
+    protected function validateParamFilters(Sabre_VObject_Property $parent, array $filters) {
 
         foreach($filters as $filter) {
 
@@ -245,11 +243,11 @@ class Sabre_CalDAV_CalendarQueryValidator {
      * A single text-match should be specified as well as the specific property
      * or parameter we need to validate.
      *
-     * @param VObject\Node $parent
+     * @param Sabre_VObject_Node $parent
      * @param array $textMatch
      * @return bool
      */
-    protected function validateTextMatch(VObject\Node $parent, array $textMatch) {
+    protected function validateTextMatch(Sabre_VObject_Node $parent, array $textMatch) {
 
         $value = (string)$parent;
 
@@ -265,12 +263,12 @@ class Sabre_CalDAV_CalendarQueryValidator {
      * This is all based on the rules specified in rfc4791, which are quite
      * complex.
      *
-     * @param VObject\Node $component
+     * @param Sabre_VObject_Node $component
      * @param DateTime $start
      * @param DateTime $end
      * @return bool
      */
-    protected function validateTimeRange(VObject\Node $component, $start, $end) {
+    protected function validateTimeRange(Sabre_VObject_Node $component, $start, $end) {
 
         if (is_null($start)) {
             $start = new DateTime('1900-01-01');
@@ -298,7 +296,7 @@ class Sabre_CalDAV_CalendarQueryValidator {
                 if ($component->parent->name === 'VEVENT' && $component->parent->RRULE) {
 
                     // Fire up the iterator!
-                    $it = new VObject\RecurrenceIterator($component->parent->parent, (string)$component->parent->UID);
+                    $it = new Sabre_VObject_RecurrenceIterator($component->parent->parent, (string)$component->parent->UID);
                     while($it->valid()) {
                         $expandedEvent = $it->getEventObject();
 
diff --git a/3rdparty/Sabre/CalDAV/CalendarRootNode.php b/3rdparty/Sabre/CalDAV/CalendarRootNode.php
index eb62eea75a6..3907913cc78 100755
--- a/3rdparty/Sabre/CalDAV/CalendarRootNode.php
+++ b/3rdparty/Sabre/CalDAV/CalendarRootNode.php
@@ -1,15 +1,14 @@
 <?php
 
 /**
- * Calendars collection
+ * Users collection
  *
- * This object is responsible for generating a list of calendar-homes for each
- * user.
+ * This object is responsible for generating a collection of users.
  *
  * @package Sabre
  * @subpackage CalDAV
  * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
+ * @author Evert Pot (http://www.rooftopsolutions.nl/) 
  * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
  */
 class Sabre_CalDAV_CalendarRootNode extends Sabre_DAVACL_AbstractPrincipalCollection {
@@ -17,7 +16,7 @@ class Sabre_CalDAV_CalendarRootNode extends Sabre_DAVACL_AbstractPrincipalCollec
     /**
      * CalDAV backend
      *
-     * @var Sabre_CalDAV_Backend_BackendInterface
+     * @var Sabre_CalDAV_Backend_Abstract
      */
     protected $caldavBackend;
 
@@ -33,10 +32,10 @@ class Sabre_CalDAV_CalendarRootNode extends Sabre_DAVACL_AbstractPrincipalCollec
      *
      *
      * @param Sabre_DAVACL_IPrincipalBackend $principalBackend
-     * @param Sabre_CalDAV_Backend_BackendInterface $caldavBackend
+     * @param Sabre_CalDAV_Backend_Abstract $caldavBackend
      * @param string $principalPrefix
      */
-    public function __construct(Sabre_DAVACL_IPrincipalBackend $principalBackend,Sabre_CalDAV_Backend_BackendInterface $caldavBackend, $principalPrefix = 'principals') {
+    public function __construct(Sabre_DAVACL_IPrincipalBackend $principalBackend,Sabre_CalDAV_Backend_Abstract $caldavBackend, $principalPrefix = 'principals') {
 
         parent::__construct($principalBackend, $principalPrefix);
         $this->caldavBackend = $caldavBackend;
diff --git a/3rdparty/Sabre/CalDAV/Exception/InvalidComponentType.php b/3rdparty/Sabre/CalDAV/Exception/InvalidComponentType.php
deleted file mode 100755
index 4ac617d22f0..00000000000
--- a/3rdparty/Sabre/CalDAV/Exception/InvalidComponentType.php
+++ /dev/null
@@ -1,32 +0,0 @@
-<?php
-
-/**
- * Sabre_CalDAV_Exception_InvalidComponentType
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Sabre_CalDAV_Exception_InvalidComponentType extends Sabre_DAV_Exception_Forbidden {
-
-    /**
-     * Adds in extra information in the xml response.
-     *
-     * This method adds the {CALDAV:}supported-calendar-component as defined in rfc4791
-     *
-     * @param Sabre_DAV_Server $server
-     * @param DOMElement $errorNode
-     * @return void
-     */
-    public function serialize(Sabre_DAV_Server $server,DOMElement $errorNode) {
-
-        $doc = $errorNode->ownerDocument;
-
-        $np = $doc->createElementNS(Sabre_CalDAV_Plugin::NS_CALDAV,'cal:supported-calendar-component');
-        $errorNode->appendChild($np);
-
-    }
-
-}
\ No newline at end of file
diff --git a/3rdparty/Sabre/CalDAV/ICSExportPlugin.php b/3rdparty/Sabre/CalDAV/ICSExportPlugin.php
index d3e4e7b7201..ec42b406b2f 100755
--- a/3rdparty/Sabre/CalDAV/ICSExportPlugin.php
+++ b/3rdparty/Sabre/CalDAV/ICSExportPlugin.php
@@ -1,7 +1,5 @@
 <?php
 
-use Sabre\VObject;
-
 /**
  * ICS Exporter
  *
@@ -84,7 +82,7 @@ class Sabre_CalDAV_ICSExportPlugin extends Sabre_DAV_ServerPlugin {
      */
     public function generateICS(array $nodes) {
 
-        $calendar = new VObject\Component('vcalendar');
+        $calendar = new Sabre_VObject_Component('vcalendar');
         $calendar->version = '2.0';
         if (Sabre_DAV_Server::$exposeVersion) {
             $calendar->prodid = '-//SabreDAV//SabreDAV ' . Sabre_DAV_Version::VERSION . '//EN';
@@ -105,7 +103,7 @@ class Sabre_CalDAV_ICSExportPlugin extends Sabre_DAV_ServerPlugin {
             }
             $nodeData = $node[200]['{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}calendar-data'];
 
-            $nodeComp = VObject\Reader::read($nodeData);
+            $nodeComp = Sabre_VObject_Reader::read($nodeData);
 
             foreach($nodeComp->children() as $child) {
 
diff --git a/3rdparty/Sabre/CalDAV/ICalendar.php b/3rdparty/Sabre/CalDAV/ICalendar.php
index 40aa9f9579c..15d51ebcf79 100755
--- a/3rdparty/Sabre/CalDAV/ICalendar.php
+++ b/3rdparty/Sabre/CalDAV/ICalendar.php
@@ -8,28 +8,11 @@
  * @package Sabre
  * @subpackage CalDAV
  * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
+ * @author Evert Pot (http://www.rooftopsolutions.nl/) 
  * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
  */
 interface Sabre_CalDAV_ICalendar extends Sabre_DAV_ICollection {
 
-    /**
-     * Performs a calendar-query on the contents of this calendar.
-     *
-     * The calendar-query is defined in RFC4791 : CalDAV. Using the
-     * calendar-query it is possible for a client to request a specific set of
-     * object, based on contents of iCalendar properties, date-ranges and
-     * iCalendar component types (VTODO, VEVENT).
-     *
-     * This method should just return a list of (relative) urls that match this
-     * query.
-     *
-     * The list of filters are specified as an array. The exact array is
-     * documented by Sabre_CalDAV_CalendarQueryParser.
-     *
-     * @param array $filters
-     * @return array
-     */
-    public function calendarQuery(array $filters);
+
 
 }
diff --git a/3rdparty/Sabre/CalDAV/IShareableCalendar.php b/3rdparty/Sabre/CalDAV/IShareableCalendar.php
deleted file mode 100755
index 5b55788c014..00000000000
--- a/3rdparty/Sabre/CalDAV/IShareableCalendar.php
+++ /dev/null
@@ -1,48 +0,0 @@
-<?php
-
-/**
- * This interface represents a Calendar that can be shared with other users.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-interface Sabre_CalDAV_IShareableCalendar extends Sabre_CalDAV_ICalendar {
-
-    /**
-     * Updates the list of shares.
-     *
-     * The first array is a list of people that are to be added to the
-     * calendar.
-     *
-     * Every element in the add array has the following properties:
-     *   * href - A url. Usually a mailto: address
-     *   * commonName - Usually a first and last name, or false
-     *   * summary - A description of the share, can also be false
-     *   * readOnly - A boolean value
-     *
-     * Every element in the remove array is just the address string.
-     *
-     * @param array $add
-     * @param array $remove
-     * @return void
-     */
-    function updateShares(array $add, array $remove);
-
-    /**
-     * Returns the list of people whom this calendar is shared with.
-     *
-     * Every element in this array should have the following properties:
-     *   * href - Often a mailto: address
-     *   * commonName - Optional, for example a first + last name
-     *   * status - See the Sabre_CalDAV_SharingPlugin::STATUS_ constants.
-     *   * readOnly - boolean
-     *   * summary - Optional, a description for the share
-     *
-     * @return array
-     */
-    function getShares();
-
-}
diff --git a/3rdparty/Sabre/CalDAV/ISharedCalendar.php b/3rdparty/Sabre/CalDAV/ISharedCalendar.php
deleted file mode 100755
index eb4d31fead5..00000000000
--- a/3rdparty/Sabre/CalDAV/ISharedCalendar.php
+++ /dev/null
@@ -1,22 +0,0 @@
-<?php
-
-/**
- * This interface represents a Calendar that is shared by a different user.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-interface Sabre_CalDAV_ISharedCalendar extends Sabre_CalDAV_ICalendar {
-
-    /**
-     * This method should return the url of the owners' copy of the shared
-     * calendar.
-     *
-     * @return string
-     */
-    function getSharedUrl();
-
-}
diff --git a/3rdparty/Sabre/CalDAV/Notifications/Collection.php b/3rdparty/Sabre/CalDAV/Notifications/Collection.php
deleted file mode 100755
index 83b6c9301dc..00000000000
--- a/3rdparty/Sabre/CalDAV/Notifications/Collection.php
+++ /dev/null
@@ -1,169 +0,0 @@
-<?php
-
-/**
- * This node represents a list of notifications.
- *
- * It provides no additional functionality, but you must implement this
- * interface to allow the Notifications plugin to mark the collection
- * as a notifications collection.
- *
- * This collection should only return Sabre_CalDAV_Notifications_INode nodes as
- * its children.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Sabre_CalDAV_Notifications_Collection extends Sabre_DAV_Collection implements Sabre_CalDAV_Notifications_ICollection, Sabre_DAVACL_IACL {
-
-    /**
-     * The notification backend
-     *
-     * @var Sabre_CalDAV_Backend_NotificationSupport
-     */
-    protected $caldavBackend;
-
-    /**
-     * Principal uri
-     *
-     * @var string
-     */
-    protected $principalUri;
-
-    /**
-     * Constructor
-     *
-     * @param Sabre_CalDAV_Backend_NotificationSupport $caldavBackend
-     * @param string $principalUri
-     */
-    public function __construct(Sabre_CalDAV_Backend_NotificationSupport $caldavBackend, $principalUri) {
-
-        $this->caldavBackend = $caldavBackend;
-        $this->principalUri = $principalUri;
-
-    }
-
-    /**
-     * Returns all notifications for a principal
-     *
-     * @return array
-     */
-    public function getChildren() {
-
-        $children = array();
-        $notifications = $this->caldavBackend->getNotificationsForPrincipal($this->principalUri);
-
-        foreach($notifications as $notification) {
-
-            $children[] = new Sabre_CalDAV_Notifications_Node(
-                $this->caldavBackend,
-                $this->principalUri,
-                $notification
-            );
-        }
-
-        return $children;
-
-    }
-
-    /**
-     * Returns the name of this object
-     *
-     * @return string
-     */
-    public function getName() {
-
-        return 'notifications';
-
-    }
-
-    /**
-     * Returns the owner principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public function getOwner() {
-
-        return $this->principalUri;
-
-    }
-
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public function getGroup() {
-
-        return null;
-
-    }
-
-    /**
-     * Returns a list of ACE's for this node.
-     *
-     * Each ACE has the following properties:
-     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
-     *     currently the only supported privileges
-     *   * 'principal', a url to the principal who owns the node
-     *   * 'protected' (optional), indicating that this ACE is not allowed to
-     *      be updated.
-     *
-     * @return array
-     */
-    public function getACL() {
-
-        return array(
-            array(
-                'principal' => $this->getOwner(),
-                'privilege' => '{DAV:}read',
-                'protected' => true,
-            ),
-            array(
-                'principal' => $this->getOwner(),
-                'privilege' => '{DAV:}write',
-                'protected' => true,
-            )
-        );
-
-    }
-
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's as an array argument.
-     *
-     * @param array $acl
-     * @return void
-     */
-    public function setACL(array $acl) {
-
-        throw new Sabre_DAV_Exception_NotImplemented('Updating ACLs is not implemented here');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See Sabre_DAVACL_Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    public function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
-}
diff --git a/3rdparty/Sabre/CalDAV/Notifications/ICollection.php b/3rdparty/Sabre/CalDAV/Notifications/ICollection.php
deleted file mode 100755
index eb873af3f92..00000000000
--- a/3rdparty/Sabre/CalDAV/Notifications/ICollection.php
+++ /dev/null
@@ -1,22 +0,0 @@
-<?php
-
-/**
- * This node represents a list of notifications.
- *
- * It provides no additional functionality, but you must implement this
- * interface to allow the Notifications plugin to mark the collection
- * as a notifications collection.
- *
- * This collection should only return Sabre_CalDAV_Notifications_INode nodes as
- * its children.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-interface Sabre_CalDAV_Notifications_ICollection extends Sabre_DAV_ICollection {
-
-
-}
diff --git a/3rdparty/Sabre/CalDAV/Notifications/INode.php b/3rdparty/Sabre/CalDAV/Notifications/INode.php
deleted file mode 100755
index 84721de5ab7..00000000000
--- a/3rdparty/Sabre/CalDAV/Notifications/INode.php
+++ /dev/null
@@ -1,38 +0,0 @@
-<?php
-
-/**
- * This node represents a single notification.
- *
- * The signature is mostly identical to that of Sabre_DAV_IFile, but the get() method
- * MUST return an xml document that matches the requirements of the
- * 'caldav-notifications.txt' spec.
- *
- * For a complete example, check out the Notification class, which contains
- * some helper functions.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-interface Sabre_CalDAV_Notifications_INode {
-
-    /**
-     * This method must return an xml element, using the
-     * Sabre_CalDAV_Notifications_INotificationType classes.
-     *
-     * @return Sabre_DAVNotification_INotificationType
-     */
-    function getNotificationType();
-
-    /**
-     * Returns the etag for the notification.
-     *
-     * The etag must be surrounded by litteral double-quotes.
-     *
-     * @return string
-     */
-    function getETag();
-
-}
diff --git a/3rdparty/Sabre/CalDAV/Notifications/INotificationType.php b/3rdparty/Sabre/CalDAV/Notifications/INotificationType.php
deleted file mode 100755
index 02a65a01fa3..00000000000
--- a/3rdparty/Sabre/CalDAV/Notifications/INotificationType.php
+++ /dev/null
@@ -1,43 +0,0 @@
-<?php
-
-/**
- * This interface reflects a single notification type.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-interface Sabre_CalDAV_Notifications_INotificationType extends Sabre_DAV_PropertyInterface {
-
-    /**
-     * This method serializes the entire notification, as it is used in the
-     * response body.
-     *
-     * @param Sabre_DAV_Server $server
-     * @param DOMElement $node
-     * @return void
-     */
-    function serializeBody(Sabre_DAV_Server $server, \DOMElement $node);
-
-    /**
-     * Returns a unique id for this notification
-     *
-     * This is just the base url. This should generally be some kind of unique
-     * id.
-     *
-     * @return string
-     */
-    function getId();
-
-    /**
-     * Returns the ETag for this notification.
-     *
-     * The ETag must be surrounded by literal double-quotes.
-     *
-     * @return string
-     */
-    function getETag();
-
-}
diff --git a/3rdparty/Sabre/CalDAV/Notifications/Node.php b/3rdparty/Sabre/CalDAV/Notifications/Node.php
deleted file mode 100755
index 8021a75debf..00000000000
--- a/3rdparty/Sabre/CalDAV/Notifications/Node.php
+++ /dev/null
@@ -1,188 +0,0 @@
-<?php
-
-/**
- * This node represents a single notification.
- *
- * The signature is mostly identical to that of Sabre_DAV_IFile, but the get() method
- * MUST return an xml document that matches the requirements of the
- * 'caldav-notifications.txt' spec.
-
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Sabre_CalDAV_Notifications_Node extends Sabre_DAV_File implements Sabre_CalDAV_Notifications_INode, Sabre_DAVACL_IACL {
-
-    /**
-     * The notification backend
-     *
-     * @var Sabre_CalDAV_Backend_NotificationSupport
-     */
-    protected $caldavBackend;
-
-    /**
-     * The actual notification
-     *
-     * @var Sabre_CalDAV_Notifications_INotificationType
-     */
-    protected $notification;
-
-    /**
-     * Owner principal of the notification
-     *
-     * @var string
-     */
-    protected $principalUri;
-
-    /**
-     * Constructor
-     *
-     * @param Sabre_CalDAV_Backend_NotificationSupport $caldavBackend
-     * @param string $principalUri
-     * @param Sabre_CalDAV_Notifications_INotificationType $notification
-     */
-    public function __construct(Sabre_CalDAV_Backend_NotificationSupport $caldavBackend, $principalUri, Sabre_CalDAV_Notifications_INotificationType $notification) {
-
-        $this->caldavBackend = $caldavBackend;
-        $this->principalUri = $principalUri;
-        $this->notification = $notification;
-
-    }
-
-    /**
-     * Returns the path name for this notification
-     *
-     * @return id
-     */
-    public function getName() {
-
-        return $this->notification->getId() . '.xml';
-
-    }
-
-    /**
-     * Returns the etag for the notification.
-     *
-     * The etag must be surrounded by litteral double-quotes.
-     *
-     * @return string
-     */
-    public function getETag() {
-
-        return $this->notification->getETag();
-
-    }
-
-    /**
-     * This method must return an xml element, using the
-     * Sabre_CalDAV_Notifications_INotificationType classes.
-     *
-     * @return Sabre_DAVNotification_INotificationType
-     */
-    public function getNotificationType() {
-
-        return $this->notification;
-
-    }
-
-    /**
-     * Deletes this notification
-     *
-     * @return void
-     */
-    public function delete() {
-
-        $this->caldavBackend->deleteNotification($this->getOwner(), $this->notification);
-
-    }
-
-    /**
-     * Returns the owner principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public function getOwner() {
-
-        return $this->principalUri;
-
-    }
-
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public function getGroup() {
-
-        return null;
-
-    }
-
-    /**
-     * Returns a list of ACE's for this node.
-     *
-     * Each ACE has the following properties:
-     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
-     *     currently the only supported privileges
-     *   * 'principal', a url to the principal who owns the node
-     *   * 'protected' (optional), indicating that this ACE is not allowed to
-     *      be updated.
-     *
-     * @return array
-     */
-    public function getACL() {
-
-        return array(
-            array(
-                'principal' => $this->getOwner(),
-                'privilege' => '{DAV:}read',
-                'protected' => true,
-            ),
-            array(
-                'principal' => $this->getOwner(),
-                'privilege' => '{DAV:}write',
-                'protected' => true,
-            )
-        );
-
-    }
-
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's as an array argument.
-     *
-     * @param array $acl
-     * @return void
-     */
-    public function setACL(array $acl) {
-
-        throw new Sabre_DAV_Exception_NotImplemented('Updating ACLs is not implemented here');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See Sabre_DAVACL_Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    public function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
-}
diff --git a/3rdparty/Sabre/CalDAV/Notifications/Notification/Invite.php b/3rdparty/Sabre/CalDAV/Notifications/Notification/Invite.php
deleted file mode 100755
index a6b36203f34..00000000000
--- a/3rdparty/Sabre/CalDAV/Notifications/Notification/Invite.php
+++ /dev/null
@@ -1,276 +0,0 @@
-<?php
-
-use Sabre_CalDAV_SharingPlugin as SharingPlugin;
-
-/**
- * This class represents the cs:invite-notification notification element.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Sabre_CalDAV_Notifications_Notification_Invite extends Sabre_DAV_Property implements Sabre_CalDAV_Notifications_INotificationType {
-
-    /**
-     * A unique id for the message
-     *
-     * @var string
-     */
-    protected $id;
-
-    /**
-     * Timestamp of the notification
-     *
-     * @var DateTime
-     */
-    protected $dtStamp;
-
-    /**
-     * A url to the recipient of the notification. This can be an email
-     * address (mailto:), or a principal url.
-     *
-     * @var string
-     */
-    protected $href;
-
-    /**
-     * The type of message, see the SharingPlugin::STATUS_* constants.
-     *
-     * @var int
-     */
-    protected $type;
-
-    /**
-     * True if access to a calendar is read-only.
-     *
-     * @var bool
-     */
-    protected $readOnly;
-
-    /**
-     * A url to the shared calendar.
-     *
-     * @var string
-     */
-    protected $hostUrl;
-
-    /**
-     * Url to the sharer of the calendar
-     *
-     * @var string
-     */
-    protected $organizer;
-
-    /**
-     * The name of the sharer.
-     *
-     * @var string
-     */
-    protected $commonName;
-
-    /**
-     * A description of the share request
-     *
-     * @var string
-     */
-    protected $summary;
-
-    /**
-     * The Etag for the notification
-     *
-     * @var string
-     */
-    protected $etag;
-
-    /**
-     * The list of supported components
-     *
-     * @var Sabre_CalDAV_Property_SupportedCalendarComponentSet
-     */
-    protected $supportedComponents;
-
-    /**
-     * Creates the Invite notification.
-     *
-     * This constructor receives an array with the following elements:
-     *
-     *   * id           - A unique id
-     *   * etag         - The etag
-     *   * dtStamp      - A DateTime object with a timestamp for the notification.
-     *   * type         - The type of notification, see SharingPlugin::STATUS_*
-     *                    constants for details.
-     *   * readOnly     - This must be set to true, if this is an invite for
-     *                    read-only access to a calendar.
-     *   * hostUrl      - A url to the shared calendar.
-     *   * organizer    - Url to the sharer principal.
-     *   * commonName   - The real name of the sharer (optional).
-     *   * summary      - Description of the share, can be the same as the
-     *                    calendar, but may also be modified (optional).
-     *   * supportedComponents - An instance of
-     *                    Sabre_CalDAV_Property_SupportedCalendarComponentSet.
-     *                    This allows the client to determine which components
-     *                    will be supported in the shared calendar. This is
-     *                    also optional.
-     *
-     * @param array $values All the options
-     */
-    public function __construct(array $values) {
-
-        $required = array(
-            'id',
-            'etag',
-            'href',
-            'dtStamp',
-            'type',
-            'readOnly',
-            'hostUrl',
-            'organizer',
-        );
-        foreach($required as $item) {
-            if (!isset($values[$item])) {
-                throw new InvalidArgumentException($item . ' is a required constructor option');
-            }
-        }
-
-        foreach($values as $key=>$value) {
-            if (!property_exists($this, $key)) {
-                throw new InvalidArgumentException('Unknown option: ' . $key);
-            }
-            $this->$key = $value;
-        }
-
-    }
-
-    /**
-     * Serializes the notification as a single property.
-     *
-     * You should usually just encode the single top-level element of the
-     * notification.
-     *
-     * @param Sabre_DAV_Server $server
-     * @param DOMElement $node
-     * @return void
-     */
-    public function serialize(Sabre_DAV_Server $server, \DOMElement $node) {
-
-        $prop = $node->ownerDocument->createElement('cs:invite-notification');
-        $node->appendChild($prop);
-
-    }
-
-    /**
-     * This method serializes the entire notification, as it is used in the
-     * response body.
-     *
-     * @param Sabre_DAV_Server $server
-     * @param DOMElement $node
-     * @return void
-     */
-    public function serializeBody(Sabre_DAV_Server $server, \DOMElement $node) {
-
-        $doc = $node->ownerDocument;
-
-        $dt = $doc->createElement('cs:dtstamp');
-        $this->dtStamp->setTimezone(new \DateTimezone('GMT'));
-        $dt->appendChild($doc->createTextNode($this->dtStamp->format('Ymd\\THis\\Z')));
-        $node->appendChild($dt);
-
-        $prop = $doc->createElement('cs:invite-notification');
-        $node->appendChild($prop);
-
-        $uid = $doc->createElement('cs:uid');
-        $uid->appendChild( $doc->createTextNode($this->id) );
-        $prop->appendChild($uid);
-
-        $href = $doc->createElement('d:href');
-        $href->appendChild( $doc->createTextNode( $this->href ) );
-        $prop->appendChild($href);
-
-        $nodeName = null;
-        switch($this->type) {
-
-            case SharingPlugin::STATUS_ACCEPTED :
-                $nodeName = 'cs:invite-accepted';
-                break;
-            case SharingPlugin::STATUS_DECLINED :
-                $nodeName = 'cs:invite-declined';
-                break;
-            case SharingPlugin::STATUS_DELETED :
-                $nodeName = 'cs:invite-deleted';
-                break;
-            case SharingPlugin::STATUS_NORESPONSE :
-                $nodeName = 'cs:invite-noresponse';
-                break;
-
-        }
-        $prop->appendChild(
-            $doc->createElement($nodeName)
-        );
-        $hostHref = $doc->createElement('d:href', $server->getBaseUri() . $this->hostUrl);
-        $hostUrl  = $doc->createElement('cs:hosturl');
-        $hostUrl->appendChild($hostHref);
-        $prop->appendChild($hostUrl);
-
-        $access = $doc->createElement('cs:access');
-        if ($this->readOnly) {
-            $access->appendChild($doc->createElement('cs:read'));
-        } else {
-            $access->appendChild($doc->createElement('cs:read-write'));
-        }
-        $prop->appendChild($access);
-
-        $organizerHref = $doc->createElement('d:href', $server->getBaseUri() . $this->organizer);
-        $organizerUrl  = $doc->createElement('cs:organizer');
-        if ($this->commonName) {
-            $commonName = $doc->createElement('cs:common-name');
-            $commonName->appendChild($doc->createTextNode($this->commonName));
-            $organizerUrl->appendChild($commonName);
-        }
-        $organizerUrl->appendChild($organizerHref);
-        $prop->appendChild($organizerUrl);
-
-        if ($this->summary) {
-            $summary = $doc->createElement('cs:summary');
-            $summary->appendChild($doc->createTextNode($this->summary));
-            $prop->appendChild($summary);
-        }
-        if ($this->supportedComponents) {
-
-            $xcomp = $doc->createElement('cal:supported-calendar-component-set');
-            $this->supportedComponents->serialize($server, $xcomp);
-            $prop->appendChild($xcomp);
-
-        }
-
-    }
-
-    /**
-     * Returns a unique id for this notification
-     *
-     * This is just the base url. This should generally be some kind of unique
-     * id.
-     *
-     * @return string
-     */
-    public function getId() {
-
-        return $this->id;
-
-    }
-
-    /**
-     * Returns the ETag for this notification.
-     *
-     * The ETag must be surrounded by literal double-quotes.
-     *
-     * @return string
-     */
-    public function getETag() {
-
-        return $this->etag;
-
-    }
-
-}
diff --git a/3rdparty/Sabre/CalDAV/Notifications/Notification/InviteReply.php b/3rdparty/Sabre/CalDAV/Notifications/Notification/InviteReply.php
deleted file mode 100755
index e935aa5aa11..00000000000
--- a/3rdparty/Sabre/CalDAV/Notifications/Notification/InviteReply.php
+++ /dev/null
@@ -1,216 +0,0 @@
-<?php
-
-use Sabre_CalDAV_SharingPlugin as SharingPlugin;
-
-/**
- * This class represents the cs:invite-reply notification element.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Sabre_CalDAV_Notifications_Notification_InviteReply extends Sabre_DAV_Property implements Sabre_CalDAV_Notifications_INotificationType {
-
-    /**
-     * A unique id for the message
-     *
-     * @var string
-     */
-    protected $id;
-
-    /**
-     * Timestamp of the notification
-     *
-     * @var DateTime
-     */
-    protected $dtStamp;
-
-    /**
-     * The unique id of the notification this was a reply to.
-     *
-     * @var string
-     */
-    protected $inReplyTo;
-
-    /**
-     * A url to the recipient of the original (!) notification.
-     *
-     * @var string
-     */
-    protected $href;
-
-    /**
-     * The type of message, see the SharingPlugin::STATUS_ constants.
-     *
-     * @var int
-     */
-    protected $type;
-
-    /**
-     * A url to the shared calendar.
-     *
-     * @var string
-     */
-    protected $hostUrl;
-
-    /**
-     * A description of the share request
-     *
-     * @var string
-     */
-    protected $summary;
-
-    /**
-     * Notification Etag
-     *
-     * @var string
-     */
-    protected $etag;
-
-    /**
-     * Creates the Invite Reply Notification.
-     *
-     * This constructor receives an array with the following elements:
-     *
-     *   * id           - A unique id
-     *   * etag         - The etag
-     *   * dtStamp      - A DateTime object with a timestamp for the notification.
-     *   * inReplyTo    - This should refer to the 'id' of the notification
-     *                    this is a reply to.
-     *   * type         - The type of notification, see SharingPlugin::STATUS_*
-     *                    constants for details.
-     *   * hostUrl      - A url to the shared calendar.
-     *   * summary      - Description of the share, can be the same as the
-     *                    calendar, but may also be modified (optional).
-     */
-    public function __construct(array $values) {
-
-        $required = array(
-            'id',
-            'etag',
-            'href',
-            'dtStamp',
-            'inReplyTo',
-            'type',
-            'hostUrl',
-        );
-        foreach($required as $item) {
-            if (!isset($values[$item])) {
-                throw new InvalidArgumentException($item . ' is a required constructor option');
-            }
-        }
-
-        foreach($values as $key=>$value) {
-            if (!property_exists($this, $key)) {
-                throw new InvalidArgumentException('Unknown option: ' . $key);
-            }
-            $this->$key = $value;
-        }
-
-    }
-
-    /**
-     * Serializes the notification as a single property.
-     *
-     * You should usually just encode the single top-level element of the
-     * notification.
-     *
-     * @param Sabre_DAV_Server $server
-     * @param DOMElement $node
-     * @return void
-     */
-    public function serialize(Sabre_DAV_Server $server, \DOMElement $node) {
-
-        $prop = $node->ownerDocument->createElement('cs:invite-reply');
-        $node->appendChild($prop);
-
-    }
-
-    /**
-     * This method serializes the entire notification, as it is used in the
-     * response body.
-     *
-     * @param Sabre_DAV_Server $server
-     * @param DOMElement $node
-     * @return void
-     */
-    public function serializeBody(Sabre_DAV_Server $server, \DOMElement $node) {
-
-        $doc = $node->ownerDocument;
-
-        $dt = $doc->createElement('cs:dtstamp');
-        $this->dtStamp->setTimezone(new \DateTimezone('GMT'));
-        $dt->appendChild($doc->createTextNode($this->dtStamp->format('Ymd\\THis\\Z')));
-        $node->appendChild($dt);
-
-        $prop = $doc->createElement('cs:invite-reply');
-        $node->appendChild($prop);
-
-        $uid = $doc->createElement('cs:uid');
-        $uid->appendChild($doc->createTextNode($this->id));
-        $prop->appendChild($uid);
-
-        $inReplyTo = $doc->createElement('cs:in-reply-to');
-        $inReplyTo->appendChild( $doc->createTextNode($this->inReplyTo) );
-        $prop->appendChild($inReplyTo);
-
-        $href = $doc->createElement('d:href');
-        $href->appendChild( $doc->createTextNode($this->href) );
-        $prop->appendChild($href);
-
-        $nodeName = null;
-        switch($this->type) {
-
-            case SharingPlugin::STATUS_ACCEPTED :
-                $nodeName = 'cs:invite-accepted';
-                break;
-            case SharingPlugin::STATUS_DECLINED :
-                $nodeName = 'cs:invite-declined';
-                break;
-
-        }
-        $prop->appendChild(
-            $doc->createElement($nodeName)
-        );
-        $hostHref = $doc->createElement('d:href', $server->getBaseUri() . $this->hostUrl);
-        $hostUrl  = $doc->createElement('cs:hosturl');
-        $hostUrl->appendChild($hostHref);
-        $prop->appendChild($hostUrl);
-
-        if ($this->summary) {
-            $summary = $doc->createElement('cs:summary');
-            $summary->appendChild($doc->createTextNode($this->summary));
-            $prop->appendChild($summary);
-        }
-
-    }
-
-    /**
-     * Returns a unique id for this notification
-     *
-     * This is just the base url. This should generally be some kind of unique
-     * id.
-     *
-     * @return string
-     */
-    public function getId() {
-
-        return $this->id;
-
-    }
-
-    /**
-     * Returns the ETag for this notification.
-     *
-     * The ETag must be surrounded by literal double-quotes.
-     *
-     * @return string
-     */
-    public function getETag() {
-
-        return $this->etag;
-
-    }
-}
diff --git a/3rdparty/Sabre/CalDAV/Notifications/Notification/SystemStatus.php b/3rdparty/Sabre/CalDAV/Notifications/Notification/SystemStatus.php
deleted file mode 100755
index f09ed3525f5..00000000000
--- a/3rdparty/Sabre/CalDAV/Notifications/Notification/SystemStatus.php
+++ /dev/null
@@ -1,179 +0,0 @@
-<?php
-
-/**
- * SystemStatus notification
- *
- * This notification can be used to indicate to the user that the system is
- * down.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Sabre_CalDAV_Notifications_Notification_SystemStatus extends Sabre_DAV_Property implements Sabre_CalDAV_Notifications_INotificationType {
-
-    const TYPE_LOW = 1;
-    const TYPE_MEDIUM = 2;
-    const TYPE_HIGH = 3;
-
-    /**
-     * A unique id
-     *
-     * @var string
-     */
-    protected $id;
-
-    /**
-     * The type of alert. This should be one of the TYPE_ constants.
-     *
-     * @var int
-     */
-    protected $type;
-
-    /**
-     * A human-readable description of the problem.
-     *
-     * @var string
-     */
-    protected $description;
-
-    /**
-     * A url to a website with more information for the user.
-     *
-     * @var string
-     */
-    protected $href;
-
-    /**
-     * Notification Etag
-     *
-     * @var string
-     */
-    protected $etag;
-
-    /**
-     * Creates the notification.
-     *
-     * Some kind of unique id should be provided. This is used to generate a
-     * url.
-     *
-     * @param string $id
-     * @param string $etag
-     * @param int $type
-     * @param string $description
-     * @param string $href
-     */
-    public function __construct($id, $etag, $type = self::TYPE_HIGH, $description = null, $href = null) {
-
-        $this->id = $id;
-        $this->type = $type;
-        $this->description = $description;
-        $this->href = $href;
-        $this->etag = $etag;
-
-    }
-
-    /**
-     * Serializes the notification as a single property.
-     *
-     * You should usually just encode the single top-level element of the
-     * notification.
-     *
-     * @param Sabre_DAV_Server $server
-     * @param DOMElement $node
-     * @return void
-     */
-    public function serialize(Sabre_DAV_Server $server, \DOMElement $node) {
-
-        switch($this->type) {
-            case self::TYPE_LOW :
-                $type = 'low';
-                break;
-            case self::TYPE_MEDIUM :
-                $type = 'medium';
-                break;
-            default :
-            case self::TYPE_HIGH :
-                $type = 'high';
-                break;
-        }
-
-        $prop = $node->ownerDocument->createElement('cs:systemstatus');
-        $prop->setAttribute('type', $type);
-
-        $node->appendChild($prop);
-
-    }
-
-    /**
-     * This method serializes the entire notification, as it is used in the
-     * response body.
-     *
-     * @param Sabre_DAV_Server $server
-     * @param DOMElement $node
-     * @return void
-     */
-    public function serializeBody(Sabre_DAV_Server $server, \DOMElement $node) {
-
-        switch($this->type) {
-            case self::TYPE_LOW :
-                $type = 'low';
-                break;
-            case self::TYPE_MEDIUM :
-                $type = 'medium';
-                break;
-            default :
-            case self::TYPE_HIGH :
-                $type = 'high';
-                break;
-        }
-
-        $prop = $node->ownerDocument->createElement('cs:systemstatus');
-        $prop->setAttribute('type', $type);
-
-        if ($this->description) {
-            $text = $node->ownerDocument->createTextNode($this->description);
-            $desc = $node->ownerDocument->createElement('cs:description');
-            $desc->appendChild($text);
-            $prop->appendChild($desc);
-        }
-        if ($this->href) {
-            $text = $node->ownerDocument->createTextNode($this->href);
-            $href = $node->ownerDocument->createElement('d:href');
-            $href->appendChild($text);
-            $prop->appendChild($href);
-        }
-
-        $node->appendChild($prop);
-
-    }
-
-    /**
-     * Returns a unique id for this notification
-     *
-     * This is just the base url. This should generally be some kind of unique
-     * id.
-     *
-     * @return string
-     */
-    public function getId() {
-
-        return $this->id;
-
-    }
-
-    /*
-     * Returns the ETag for this notification.
-     *
-     * The ETag must be surrounded by literal double-quotes.
-     *
-     * @return string
-     */
-    public function getETag() {
-
-        return $this->etag;
-
-    }
-}
diff --git a/3rdparty/Sabre/CalDAV/Plugin.php b/3rdparty/Sabre/CalDAV/Plugin.php
index f3d11969c8b..c56ab384844 100755
--- a/3rdparty/Sabre/CalDAV/Plugin.php
+++ b/3rdparty/Sabre/CalDAV/Plugin.php
@@ -1,7 +1,5 @@
 <?php
 
-use Sabre\VObject;
-
 /**
  * CalDAV plugin
  *
@@ -26,6 +24,16 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
      */
     const NS_CALENDARSERVER = 'http://calendarserver.org/ns/';
 
+    /**
+     * The following constants are used to differentiate
+     * the various filters for the calendar-query report
+     */
+    const FILTER_COMPFILTER   = 1;
+    const FILTER_TIMERANGE    = 3;
+    const FILTER_PROPFILTER   = 4;
+    const FILTER_PARAMFILTER  = 5;
+    const FILTER_TEXTMATCH    = 6;
+
     /**
      * The hardcoded root for calendar objects. It is unfortunate
      * that we're stuck with it, but it will have to do for now
@@ -164,19 +172,16 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
         $server->subscribeEvent('onBrowserPostAction', array($this,'browserPostAction'));
         $server->subscribeEvent('beforeWriteContent', array($this, 'beforeWriteContent'));
         $server->subscribeEvent('beforeCreateFile', array($this, 'beforeCreateFile'));
-        $server->subscribeEvent('beforeMethod', array($this,'beforeMethod'));
 
         $server->xmlNamespaces[self::NS_CALDAV] = 'cal';
         $server->xmlNamespaces[self::NS_CALENDARSERVER] = 'cs';
 
         $server->propertyMap['{' . self::NS_CALDAV . '}supported-calendar-component-set'] = 'Sabre_CalDAV_Property_SupportedCalendarComponentSet';
-        $server->propertyMap['{' . self::NS_CALDAV . '}schedule-calendar-transp'] = 'Sabre_CalDAV_Property_ScheduleCalendarTransp';
 
         $server->resourceTypeMapping['Sabre_CalDAV_ICalendar'] = '{urn:ietf:params:xml:ns:caldav}calendar';
         $server->resourceTypeMapping['Sabre_CalDAV_Schedule_IOutbox'] = '{urn:ietf:params:xml:ns:caldav}schedule-outbox';
         $server->resourceTypeMapping['Sabre_CalDAV_Principal_ProxyRead'] = '{http://calendarserver.org/ns/}calendar-proxy-read';
         $server->resourceTypeMapping['Sabre_CalDAV_Principal_ProxyWrite'] = '{http://calendarserver.org/ns/}calendar-proxy-write';
-        $server->resourceTypeMapping['Sabre_CalDAV_Notifications_ICollection'] = '{' . self::NS_CALENDARSERVER . '}notification';
 
         array_push($server->protectedProperties,
 
@@ -200,9 +205,7 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
             // CalendarServer extensions
             '{' . self::NS_CALENDARSERVER . '}getctag',
             '{' . self::NS_CALENDARSERVER . '}calendar-proxy-read-for',
-            '{' . self::NS_CALENDARSERVER . '}calendar-proxy-write-for',
-            '{' . self::NS_CALENDARSERVER . '}notification-URL',
-            '{' . self::NS_CALENDARSERVER . '}notificationtype'
+            '{' . self::NS_CALENDARSERVER . '}calendar-proxy-write-for'
 
         );
     }
@@ -223,13 +226,6 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
                 // unknownMethod event.
                 return false;
             case 'POST' :
-
-                // Checking if this is a text/calendar content type
-                $contentType = $this->server->httpRequest->getHeader('Content-Type');
-                if (strpos($contentType, 'text/calendar')!==0) {
-                    return;
-                }
-
                 // Checking if we're talking to an outbox
                 try {
                     $node = $this->server->tree->getNodeForPath($uri);
@@ -239,7 +235,7 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
                 if (!$node instanceof Sabre_CalDAV_Schedule_IOutbox)
                     return;
 
-                $this->outboxRequest($node, $uri);
+                $this->outboxRequest($node);
                 return false;
 
         }
@@ -352,7 +348,7 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
             if (in_array($calProp,$requestedProperties)) {
 
                 $addresses = $node->getAlternateUriSet();
-                $addresses[] = $this->server->getBaseUri() . $node->getPrincipalUrl() . '/';
+                $addresses[] = $this->server->getBaseUri() . $node->getPrincipalUrl();
                 unset($requestedProperties[$calProp]);
                 $returnedProperties[200][$calProp] = new Sabre_DAV_Property_HrefList($addresses, false);
 
@@ -394,31 +390,8 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
 
             }
 
-            // notification-URL property
-            $notificationUrl = '{' . self::NS_CALENDARSERVER . '}notification-URL';
-            if (($index = array_search($notificationUrl, $requestedProperties)) !== false) {
-                $principalId = $node->getName();
-                $calendarHomePath = 'calendars/' . $principalId . '/notifications/';
-                unset($requestedProperties[$index]);
-                $returnedProperties[200][$notificationUrl] = new Sabre_DAV_Property_Href($calendarHomePath);
-            }
-
         } // instanceof IPrincipal
 
-        if ($node instanceof Sabre_CalDAV_Notifications_INode) {
-
-            $propertyName = '{' . self::NS_CALENDARSERVER . '}notificationtype';
-            if (($index = array_search($propertyName, $requestedProperties)) !== false) {
-
-                $returnedProperties[200][$propertyName] =
-                    $node->getNotificationType();
-
-                unset($requestedProperties[$index]);
-
-            }
-
-        } // instanceof Notifications_INode
-
 
         if ($node instanceof Sabre_CalDAV_ICalendarObject) {
             // The calendar-data property is not supposed to be a 'real'
@@ -451,11 +424,11 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
     public function calendarMultiGetReport($dom) {
 
         $properties = array_keys(Sabre_DAV_XMLUtil::parseProperties($dom->firstChild));
-        $hrefElems = $dom->getElementsByTagNameNS('DAV:','href');
+        $hrefElems = $dom->getElementsByTagNameNS('urn:DAV','href');
 
         $xpath = new DOMXPath($dom);
         $xpath->registerNameSpace('cal',Sabre_CalDAV_Plugin::NS_CALDAV);
-        $xpath->registerNameSpace('dav','DAV:');
+        $xpath->registerNameSpace('dav','urn:DAV');
 
         $expand = $xpath->query('/cal:calendar-multiget/dav:prop/cal:calendar-data/cal:expand');
         if ($expand->length>0) {
@@ -465,8 +438,8 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
             if(!$start || !$end) {
                 throw new Sabre_DAV_Exception_BadRequest('The "start" and "end" attributes are required for the CALDAV:expand element');
             }
-            $start = VObject\DateTimeParser::parseDateTime($start);
-            $end = VObject\DateTimeParser::parseDateTime($end);
+            $start = Sabre_VObject_DateTimeParser::parseDateTime($start);
+            $end = Sabre_VObject_DateTimeParser::parseDateTime($end);
 
             if ($end <= $start) {
                 throw new Sabre_DAV_Exception_BadRequest('The end-date must be larger than the start-date in the expand element.');
@@ -485,7 +458,7 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
             list($objProps) = $this->server->getPropertiesForPath($uri,$properties);
 
             if ($expand && isset($objProps[200]['{' . self::NS_CALDAV . '}calendar-data'])) {
-                $vObject = VObject\Reader::read($objProps[200]['{' . self::NS_CALDAV . '}calendar-data']);
+                $vObject = Sabre_VObject_Reader::read($objProps[200]['{' . self::NS_CALDAV . '}calendar-data']);
                 $vObject->expand($start, $end);
                 $objProps[200]['{' . self::NS_CALDAV . '}calendar-data'] = $vObject->serialize();
             }
@@ -494,12 +467,9 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
 
         }
 
-        $prefer = $this->server->getHTTPPRefer();
-
         $this->server->httpResponse->sendStatus(207);
         $this->server->httpResponse->setHeader('Content-Type','application/xml; charset=utf-8');
-        $this->server->httpResponse->setHeader('Vary','Brief,Prefer');
-        $this->server->httpResponse->sendBody($this->server->generateMultiStatus($propertyList, $prefer['return-minimal']));
+        $this->server->httpResponse->sendBody($this->server->generateMultiStatus($propertyList));
 
     }
 
@@ -517,95 +487,54 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
         $parser = new Sabre_CalDAV_CalendarQueryParser($dom);
         $parser->parse();
 
-        $node = $this->server->tree->getNodeForPath($this->server->getRequestUri());
-        $depth = $this->server->getHTTPDepth(0);
-
-        // The default result is an empty array
-        $result = array();
+        $requestedCalendarData = true;
+        $requestedProperties = $parser->requestedProperties;
 
-        // The calendarobject was requested directly. In this case we handle
-        // this locally.
-        if ($depth == 0 && $node instanceof Sabre_CalDAV_ICalendarObject) {
+        if (!in_array('{urn:ietf:params:xml:ns:caldav}calendar-data', $requestedProperties)) {
 
-            $requestedCalendarData = true;
-            $requestedProperties = $parser->requestedProperties;
+            // We always retrieve calendar-data, as we need it for filtering.
+            $requestedProperties[] = '{urn:ietf:params:xml:ns:caldav}calendar-data';
 
-            if (!in_array('{urn:ietf:params:xml:ns:caldav}calendar-data', $requestedProperties)) {
-
-                // We always retrieve calendar-data, as we need it for filtering.
-                $requestedProperties[] = '{urn:ietf:params:xml:ns:caldav}calendar-data';
-
-                // If calendar-data wasn't explicitly requested, we need to remove
-                // it after processing.
-                $requestedCalendarData = false;
-            }
+            // If calendar-data wasn't explicitly requested, we need to remove
+            // it after processing.
+            $requestedCalendarData = false;
+        }
 
-            $properties = $this->server->getPropertiesForPath(
-                $this->server->getRequestUri(),
-                $requestedProperties,
-                0
-            );
+        // These are the list of nodes that potentially match the requirement
+        $candidateNodes = $this->server->getPropertiesForPath(
+            $this->server->getRequestUri(),
+            $requestedProperties,
+            $this->server->getHTTPDepth(0)
+        );
 
-            // This array should have only 1 element, the first calendar
-            // object.
-            $properties = current($properties);
+        $verifiedNodes = array();
 
-            // If there wasn't any calendar-data returned somehow, we ignore
-            // this.
-            if (isset($properties[200]['{urn:ietf:params:xml:ns:caldav}calendar-data'])) {
+        $validator = new Sabre_CalDAV_CalendarQueryValidator();
 
-                $validator = new Sabre_CalDAV_CalendarQueryValidator();
-                $vObject = VObject\Reader::read($properties[200]['{urn:ietf:params:xml:ns:caldav}calendar-data']);
-                if ($validator->validate($vObject,$parser->filters)) {
+        foreach($candidateNodes as $node) {
 
-                    // If the client didn't require the calendar-data property,
-                    // we won't give it back.
-                    if (!$requestedCalendarData) {
-                        unset($properties[200]['{urn:ietf:params:xml:ns:caldav}calendar-data']);
-                    } else {
-                        if ($parser->expand) {
-                            $vObject->expand($parser->expand['start'], $parser->expand['end']);
-                            $properties[200]['{' . self::NS_CALDAV . '}calendar-data'] = $vObject->serialize();
-                        }
-                    }
+            // If the node didn't have a calendar-data property, it must not be a calendar object
+            if (!isset($node[200]['{urn:ietf:params:xml:ns:caldav}calendar-data']))
+                continue;
 
-                    $result = array($properties);
+            $vObject = Sabre_VObject_Reader::read($node[200]['{urn:ietf:params:xml:ns:caldav}calendar-data']);
+            if ($validator->validate($vObject,$parser->filters)) {
 
+                if (!$requestedCalendarData) {
+                    unset($node[200]['{urn:ietf:params:xml:ns:caldav}calendar-data']);
                 }
-
-            }
-
-        }
-        // If we're dealing with a calendar, the calendar itself is responsible
-        // for the calendar-query.
-        if ($node instanceof Sabre_CalDAV_ICalendar && $depth = 1) {
-
-            $nodePaths = $node->calendarQuery($parser->filters);
-
-            foreach($nodePaths as $path) {
-
-                list($properties) =
-                    $this->server->getPropertiesForPath($this->server->getRequestUri() . '/' . $path, $parser->requestedProperties);
-
                 if ($parser->expand) {
-                    // We need to do some post-processing
-                    $vObject = VObject\Reader::read($properties[200]['{urn:ietf:params:xml:ns:caldav}calendar-data']);
                     $vObject->expand($parser->expand['start'], $parser->expand['end']);
-                    $properties[200]['{' . self::NS_CALDAV . '}calendar-data'] = $vObject->serialize();
+                    $node[200]['{' . self::NS_CALDAV . '}calendar-data'] = $vObject->serialize();
                 }
-
-                $result[] = $properties;
-
+                $verifiedNodes[] = $node;
             }
 
         }
 
-        $prefer = $this->server->getHTTPPRefer();
-
         $this->server->httpResponse->sendStatus(207);
         $this->server->httpResponse->setHeader('Content-Type','application/xml; charset=utf-8');
-        $this->server->httpResponse->setHeader('Vary','Brief,Prefer');
-        $this->server->httpResponse->sendBody($this->server->generateMultiStatus($result, $prefer['return-minimal']));
+        $this->server->httpResponse->sendBody($this->server->generateMultiStatus($verifiedNodes));
 
     }
 
@@ -632,10 +561,10 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
 
         }
         if ($start) {
-            $start = VObject\DateTimeParser::parseDateTime($start);
+            $start = Sabre_VObject_DateTimeParser::parseDateTime($start);
         }
         if ($end) {
-            $end = VObject\DateTimeParser::parseDateTime($end);
+            $end = Sabre_VObject_DateTimeParser::parseDateTime($end);
         }
 
         if (!$start && !$end) {
@@ -654,33 +583,15 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
             throw new Sabre_DAV_Exception_NotImplemented('The free-busy-query REPORT is only implemented on calendars');
         }
 
-        // Doing a calendar-query first, to make sure we get the most
-        // performance.
-        $urls = $calendar->calendarQuery(array(
-            'name' => 'VCALENDAR',
-            'comp-filters' => array(
-                array(
-                    'name' => 'VEVENT',
-                    'comp-filters' => array(),
-                    'prop-filters' => array(),
-                    'is-not-defined' => false,
-                    'time-range' => array(
-                        'start' => $start,
-                        'end' => $end,
-                    ),
-                ),
-            ),
-            'prop-filters' => array(),
-            'is-not-defined' => false,
-            'time-range' => null,
-        ));
-
-        $objects = array_map(function($url) use ($calendar) {
-            $obj = $calendar->getChild($url)->get();
+        $objects = array_map(function($child) {
+            $obj = $child->get();
+            if (is_resource($obj)) {
+                $obj = stream_get_contents($obj);
+            }
             return $obj;
-        }, $urls);
+        }, $calendar->getChildren());
 
-        $generator = new VObject\FreeBusyGenerator();
+        $generator = new Sabre_VObject_FreeBusyGenerator();
         $generator->setObjects($objects);
         $generator->setTimeRange($start, $end);
         $result = $generator->getResult();
@@ -709,7 +620,7 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
         if (!$node instanceof Sabre_CalDAV_ICalendarObject)
             return;
 
-        $this->validateICalendar($data, $path);
+        $this->validateICalendar($data);
 
     }
 
@@ -729,52 +640,7 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
         if (!$parentNode instanceof Sabre_CalDAV_Calendar)
             return;
 
-        $this->validateICalendar($data, $path);
-
-    }
-
-    /**
-     * This event is triggered before any HTTP request is handled.
-     *
-     * We use this to intercept GET calls to notification nodes, and return the
-     * proper response.
-     *
-     * @param string $method
-     * @param string $path
-     * @return void
-     */
-    public function beforeMethod($method, $path) {
-
-        if ($method!=='GET') return;
-
-        try {
-            $node = $this->server->tree->getNodeForPath($path);
-        } catch (Sabre_DAV_Exception_NotFound $e) {
-            return;
-        }
-
-        if (!$node instanceof Sabre_CalDAV_Notifications_INode)
-            return;
-
-        if (!$this->server->checkPreconditions(true)) return false;
-
-        $dom = new DOMDocument('1.0', 'UTF-8');
-        $dom->formatOutput = true;
-
-        $root = $dom->createElement('cs:notification');
-        foreach($this->server->xmlNamespaces as $namespace => $prefix) {
-            $root->setAttribute('xmlns:' . $prefix, $namespace);
-        }
-
-        $dom->appendChild($root);
-        $node->getNotificationType()->serializeBody($this->server, $root);
-
-        $this->server->httpResponse->setHeader('Content-Type','application/xml');
-        $this->server->httpResponse->setHeader('ETag',$node->getETag());
-        $this->server->httpResponse->sendStatus(200);
-        $this->server->httpResponse->sendBody($dom->saveXML());
-
-        return false;
+        $this->validateICalendar($data);
 
     }
 
@@ -784,10 +650,9 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
      * An exception is thrown if it's not.
      *
      * @param resource|string $data
-     * @param string $path
      * @return void
      */
-    protected function validateICalendar(&$data, $path) {
+    protected function validateICalendar(&$data) {
 
         // If it's a stream, we convert it to a string first.
         if (is_resource($data)) {
@@ -799,9 +664,9 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
 
         try {
 
-            $vobj = VObject\Reader::read($data);
+            $vobj = Sabre_VObject_Reader::read($data);
 
-        } catch (VObject\ParseException $e) {
+        } catch (Sabre_VObject_ParseException $e) {
 
             throw new Sabre_DAV_Exception_UnsupportedMediaType('This resource only supports valid iCalendar 2.0 data. Parse error: ' . $e->getMessage());
 
@@ -811,11 +676,6 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
             throw new Sabre_DAV_Exception_UnsupportedMediaType('This collection can only support iCalendar objects.');
         }
 
-        // Get the Supported Components for the target calendar
-        list($parentPath,$object) = Sabre_Dav_URLUtil::splitPath($path);
-        $calendarProperties = $this->server->getProperties($parentPath,array('{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set'));
-        $supportedComponents = $calendarProperties['{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set']->getValue();
-
         $foundType = null;
         $foundUID = null;
         foreach($vobj->getComponents() as $component) {
@@ -827,9 +687,6 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
                 case 'VJOURNAL' :
                     if (is_null($foundType)) {
                         $foundType = $component->name;
-                        if (!in_array($foundType, $supportedComponents)) {
-                            throw new Sabre_CalDAV_Exception_InvalidComponentType('This calendar only supports ' . implode(', ', $supportedComponents) . '. We found a ' . $foundType);
-                        }
                         if (!isset($component->UID)) {
                             throw new Sabre_DAV_Exception_BadRequest('Every ' . $component->name . ' component must have an UID');
                         }
@@ -854,81 +711,12 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
     }
 
     /**
-     * This method handles POST requests to the schedule-outbox.
-     *
-     * Currently, two types of requests are support:
-     *   * FREEBUSY requests from RFC 6638
-     *   * Simple iTIP messages from draft-desruisseaux-caldav-sched-04
-     *
-     * The latter is from an expired early draft of the CalDAV scheduling
-     * extensions, but iCal depends on a feature from that spec, so we
-     * implement it.
+     * This method handles POST requests to the schedule-outbox
      *
      * @param Sabre_CalDAV_Schedule_IOutbox $outboxNode
-     * @param string $outboxUri
-     * @return void
-     */
-    public function outboxRequest(Sabre_CalDAV_Schedule_IOutbox $outboxNode, $outboxUri) {
-
-        // Parsing the request body
-        try {
-            $vObject = VObject\Reader::read($this->server->httpRequest->getBody(true));
-        } catch (VObject\ParseException $e) {
-            throw new Sabre_DAV_Exception_BadRequest('The request body must be a valid iCalendar object. Parse error: ' . $e->getMessage());
-        }
-
-        // The incoming iCalendar object must have a METHOD property, and a
-        // component. The combination of both determines what type of request
-        // this is.
-        $componentType = null;
-        foreach($vObject->getComponents() as $component) {
-            if ($component->name !== 'VTIMEZONE') {
-                $componentType = $component->name;
-                break;
-            }
-        }
-        if (is_null($componentType)) {
-            throw new Sabre_DAV_Exception_BadRequest('We expected at least one VTODO, VJOURNAL, VFREEBUSY or VEVENT component');
-        }
-
-        // Validating the METHOD
-        $method = strtoupper((string)$vObject->METHOD);
-        if (!$method) {
-            throw new Sabre_DAV_Exception_BadRequest('A METHOD property must be specified in iTIP messages');
-        }
-
-        // So we support two types of requests:
-        //
-        // REQUEST with a VFREEBUSY component
-        // REQUEST, REPLY, ADD, CANCEL on VEVENT components
-
-        $acl = $this->server->getPlugin('acl');
-
-        if ($componentType === 'VFREEBUSY' && $method === 'REQUEST') {
-
-            $acl && $acl->checkPrivileges($outboxUri,'{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}schedule-query-freebusy');
-            $this->handleFreeBusyRequest($outboxNode, $vObject);
-
-        } elseif ($componentType === 'VEVENT' && in_array($method, array('REQUEST','REPLY','ADD','CANCEL'))) {
-
-            $acl && $acl->checkPrivileges($outboxUri,'{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}schedule-post-vevent');
-            $this->handleEventNotification($outboxNode, $vObject);
-
-        } else {
-
-            throw new Sabre_DAV_Exception_NotImplemented('SabreDAV supports only VFREEBUSY (REQUEST) and VEVENT (REQUEST, REPLY, ADD, CANCEL)');
-
-        }
-
-    }
-
-    /**
-     * This method handles the REQUEST, REPLY, ADD and CANCEL methods for
-     * VEVENT iTip messages.
-     *
      * @return void
      */
-    protected function handleEventNotification(Sabre_CalDAV_Schedule_IOutbox $outboxNode, VObject\Component $vObject) {
+    public function outboxRequest(Sabre_CalDAV_Schedule_IOutbox $outboxNode) {
 
         $originator = $this->server->httpRequest->getHeader('Originator');
         $recipients = $this->server->httpRequest->getHeader('Recipient');
@@ -972,10 +760,38 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
             throw new Sabre_DAV_Exception_Forbidden('The addresses specified in the Originator header did not match any addresses in the owners calendar-user-address-set header');
         }
 
-        $result = $this->iMIPMessage($originator, $recipients, $vObject, $principal);
-        $this->server->httpResponse->sendStatus(200);
-        $this->server->httpResponse->setHeader('Content-Type','application/xml');
-        $this->server->httpResponse->sendBody($this->generateScheduleResponse($result));
+        try {
+            $vObject = Sabre_VObject_Reader::read($this->server->httpRequest->getBody(true));
+        } catch (Sabre_VObject_ParseException $e) {
+            throw new Sabre_DAV_Exception_BadRequest('The request body must be a valid iCalendar object. Parse error: ' . $e->getMessage());
+        }
+
+        // Checking for the object type
+        $componentType = null;
+        foreach($vObject->getComponents() as $component) {
+            if ($component->name !== 'VTIMEZONE') {
+                $componentType = $component->name;
+                break;
+            }
+        }
+        if (is_null($componentType)) {
+            throw new Sabre_DAV_Exception_BadRequest('We expected at least one VTODO, VJOURNAL, VFREEBUSY or VEVENT component');
+        }
+
+        // Validating the METHOD
+        $method = strtoupper((string)$vObject->METHOD);
+        if (!$method) {
+            throw new Sabre_DAV_Exception_BadRequest('A METHOD property must be specified in iTIP messages');
+        }
+
+        if (in_array($method, array('REQUEST','REPLY','ADD','CANCEL')) && $componentType==='VEVENT') {
+            $result = $this->iMIPMessage($originator, $recipients, $vObject);
+            $this->server->httpResponse->sendStatus(200);
+            $this->server->httpResponse->setHeader('Content-Type','application/xml');
+            $this->server->httpResponse->sendBody($this->generateScheduleResponse($result));
+        } else {
+            throw new Sabre_DAV_Exception_NotImplemented('This iTIP method is currently not implemented');
+        }
 
     }
 
@@ -997,15 +813,15 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
      *
      * @param string $originator
      * @param array $recipients
-     * @param Sabre\VObject\Component $vObject
+     * @param Sabre_VObject_Component $vObject
      * @return array
      */
-    protected function iMIPMessage($originator, array $recipients, VObject\Component $vObject, $principal) {
+    protected function iMIPMessage($originator, array $recipients, Sabre_VObject_Component $vObject) {
 
         if (!$this->imipHandler) {
             $resultStatus = '5.2;This server does not support this operation';
         } else {
-            $this->imipHandler->sendMessage($originator, $recipients, $vObject, $principal);
+            $this->imipHandler->sendMessage($originator, $recipients, $vObject);
             $resultStatus = '2.0;Success';
         }
 
@@ -1016,6 +832,7 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
 
         return $result;
 
+
     }
 
     /**
@@ -1060,204 +877,6 @@ class Sabre_CalDAV_Plugin extends Sabre_DAV_ServerPlugin {
 
     }
 
-    /**
-     * This method is responsible for parsing a free-busy query request and
-     * returning it's result.
-     *
-     * @param Sabre_CalDAV_Schedule_IOutbox $outbox
-     * @param string $request
-     * @return string
-     */
-    protected function handleFreeBusyRequest(Sabre_CalDAV_Schedule_IOutbox $outbox, VObject\Component $vObject) {
-
-        $vFreeBusy = $vObject->VFREEBUSY;
-        $organizer = $vFreeBusy->organizer;
-
-        $organizer = (string)$organizer;
-
-        // Validating if the organizer matches the owner of the inbox.
-        $owner = $outbox->getOwner();
-
-        $caldavNS = '{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}';
-
-        $uas = $caldavNS . 'calendar-user-address-set';
-        $props = $this->server->getProperties($owner,array($uas));
-
-        if (empty($props[$uas]) || !in_array($organizer, $props[$uas]->getHrefs())) {
-            throw new Sabre_DAV_Exception_Forbidden('The organizer in the request did not match any of the addresses for the owner of this inbox');
-        }
-
-        if (!isset($vFreeBusy->ATTENDEE)) {
-            throw new Sabre_DAV_Exception_BadRequest('You must at least specify 1 attendee');
-        }
-
-        $attendees = array();
-        foreach($vFreeBusy->ATTENDEE as $attendee) {
-            $attendees[]= (string)$attendee;
-        }
-
-
-        if (!isset($vFreeBusy->DTSTART) || !isset($vFreeBusy->DTEND)) {
-            throw new Sabre_DAV_Exception_BadRequest('DTSTART and DTEND must both be specified');
-        }
-
-        $startRange = $vFreeBusy->DTSTART->getDateTime();
-        $endRange = $vFreeBusy->DTEND->getDateTime();
-
-        $results = array();
-        foreach($attendees as $attendee) {
-            $results[] = $this->getFreeBusyForEmail($attendee, $startRange, $endRange, $vObject);
-        }
-
-        $dom = new DOMDocument('1.0','utf-8');
-        $dom->formatOutput = true;
-        $scheduleResponse = $dom->createElement('cal:schedule-response');
-        foreach($this->server->xmlNamespaces as $namespace=>$prefix) {
-
-            $scheduleResponse->setAttribute('xmlns:' . $prefix,$namespace);
-
-        }
-        $dom->appendChild($scheduleResponse);
-
-        foreach($results as $result) {
-            $response = $dom->createElement('cal:response');
-
-            $recipient = $dom->createElement('cal:recipient');
-            $recipientHref = $dom->createElement('d:href');
-
-            $recipientHref->appendChild($dom->createTextNode($result['href']));
-            $recipient->appendChild($recipientHref);
-            $response->appendChild($recipient);
-
-            $reqStatus = $dom->createElement('cal:request-status');
-            $reqStatus->appendChild($dom->createTextNode($result['request-status']));
-            $response->appendChild($reqStatus);
-
-            if (isset($result['calendar-data'])) {
-
-                $calendardata = $dom->createElement('cal:calendar-data');
-                $calendardata->appendChild($dom->createTextNode(str_replace("\r\n","\n",$result['calendar-data']->serialize())));
-                $response->appendChild($calendardata);
-
-            }
-            $scheduleResponse->appendChild($response);
-        }
-
-        $this->server->httpResponse->sendStatus(200);
-        $this->server->httpResponse->setHeader('Content-Type','application/xml');
-        $this->server->httpResponse->sendBody($dom->saveXML());
-
-    }
-
-    /**
-     * Returns free-busy information for a specific address. The returned
-     * data is an array containing the following properties:
-     *
-     * calendar-data : A VFREEBUSY VObject
-     * request-status : an iTip status code.
-     * href: The principal's email address, as requested
-     *
-     * The following request status codes may be returned:
-     *   * 2.0;description
-     *   * 3.7;description
-     *
-     * @param string $email address
-     * @param DateTime $start
-     * @param DateTime $end
-     * @param Sabre_VObject_Component $request
-     * @return Sabre_VObject_Component
-     */
-    protected function getFreeBusyForEmail($email, DateTime $start, DateTime $end, VObject\Component $request) {
-
-        $caldavNS = '{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}';
-
-        $aclPlugin = $this->server->getPlugin('acl');
-        if (substr($email,0,7)==='mailto:') $email = substr($email,7);
-
-        $result = $aclPlugin->principalSearch(
-            array('{http://sabredav.org/ns}email-address' => $email),
-            array(
-                '{DAV:}principal-URL', $caldavNS . 'calendar-home-set',
-                '{http://sabredav.org/ns}email-address',
-            )
-        );
-
-        if (!count($result)) {
-            return array(
-                'request-status' => '3.7;Could not find principal',
-                'href' => 'mailto:' . $email,
-            );
-        }
-
-        if (!isset($result[0][200][$caldavNS . 'calendar-home-set'])) {
-            return array(
-                'request-status' => '3.7;No calendar-home-set property found',
-                'href' => 'mailto:' . $email,
-            );
-        }
-        $homeSet = $result[0][200][$caldavNS . 'calendar-home-set']->getHref();
-
-        // Grabbing the calendar list
-        $objects = array();
-        foreach($this->server->tree->getNodeForPath($homeSet)->getChildren() as $node) {
-            if (!$node instanceof Sabre_CalDAV_ICalendar) {
-                continue;
-            }
-            $aclPlugin->checkPrivileges($homeSet . $node->getName() ,$caldavNS . 'read-free-busy');
-
-            // Getting the list of object uris within the time-range
-            $urls = $node->calendarQuery(array(
-                'name' => 'VCALENDAR',
-                'comp-filters' => array(
-                    array(
-                        'name' => 'VEVENT',
-                        'comp-filters' => array(),
-                        'prop-filters' => array(),
-                        'is-not-defined' => false,
-                        'time-range' => array(
-                            'start' => $start,
-                            'end' => $end,
-                        ),
-                    ),
-                ),
-                'prop-filters' => array(),
-                'is-not-defined' => false,
-                'time-range' => null,
-            ));
-
-            $calObjects = array_map(function($url) use ($node) {
-                $obj = $node->getChild($url)->get();
-                return $obj;
-            }, $urls);
-
-            $objects = array_merge($objects,$calObjects);
-
-        }
-
-        $vcalendar = VObject\Component::create('VCALENDAR');
-        $vcalendar->VERSION = '2.0';
-        $vcalendar->METHOD = 'REPLY';
-        $vcalendar->CALSCALE = 'GREGORIAN';
-        $vcalendar->PRODID = '-//SabreDAV//SabreDAV ' . Sabre_DAV_Version::VERSION . '//EN';
-
-        $generator = new VObject\FreeBusyGenerator();
-        $generator->setObjects($objects);
-        $generator->setTimeRange($start, $end);
-        $generator->setBaseObject($vcalendar);
-
-        $result = $generator->getResult();
-
-        $vcalendar->VFREEBUSY->ATTENDEE = 'mailto:' . $email;
-        $vcalendar->VFREEBUSY->UID = (string)$request->VFREEBUSY->UID;
-        $vcalendar->VFREEBUSY->ORGANIZER = clone $request->VFREEBUSY->ORGANIZER;
-
-        return array(
-            'calendar-data' => $result,
-            'request-status' => '2.0;Success',
-            'href' => 'mailto:' . $email,
-        );
-    }
-
     /**
      * This method is used to generate HTML output for the
      * Sabre_DAV_Browser_Plugin. This allows us to generate an interface users
diff --git a/3rdparty/Sabre/CalDAV/Property/AllowedSharingModes.php b/3rdparty/Sabre/CalDAV/Property/AllowedSharingModes.php
deleted file mode 100755
index efe751732c5..00000000000
--- a/3rdparty/Sabre/CalDAV/Property/AllowedSharingModes.php
+++ /dev/null
@@ -1,72 +0,0 @@
-<?php
-
-/**
- * AllowedSharingModes
- *
- * This property encodes the 'allowed-sharing-modes' property, as defined by
- * the 'caldav-sharing-02' spec, in the http://calendarserver.org/ns/
- * namespace.
- *
- * This property is a representation of the supported-calendar_component-set
- * property in the CalDAV namespace. It simply requires an array of components,
- * such as VEVENT, VTODO
- *
- * @package Sabre
- * @subpackage CalDAV
- * @see https://trac.calendarserver.org/browser/CalendarServer/trunk/doc/Extensions/caldav-sharing-02.txt
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Sabre_CalDAV_Property_AllowedSharingModes extends Sabre_DAV_Property {
-
-    /**
-     * Whether or not a calendar can be shared with another user
-     *
-     * @var bool
-     */
-    protected $canBeShared;
-
-    /**
-     * Whether or not the calendar can be placed on a public url.
-     *
-     * @var bool
-     */
-    protected $canBePublished;
-
-    /**
-     * Constructor
-     *
-     * @param bool $canBeShared
-     * @param bool $canBePublished
-     * @return void
-     */
-    public function __construct($canBeShared, $canBePublished) {
-
-        $this->canBeShared = $canBeShared;
-        $this->canBePublished = $canBePublished;
-
-    }
-
-    /**
-     * Serializes the property in a DOMDocument
-     *
-     * @param Sabre_DAV_Server $server
-     * @param DOMElement $node
-     * @return void
-     */
-    public function serialize(Sabre_DAV_Server $server,DOMElement $node) {
-
-       $doc = $node->ownerDocument;
-       if ($this->canBeShared) {
-            $xcomp = $doc->createElement('cs:can-be-shared');
-            $node->appendChild($xcomp);
-       }
-       if ($this->canBePublished) {
-            $xcomp = $doc->createElement('cs:can-be-published');
-            $node->appendChild($xcomp);
-       }
-
-    }
-
-}
diff --git a/3rdparty/Sabre/CalDAV/Property/Invite.php b/3rdparty/Sabre/CalDAV/Property/Invite.php
deleted file mode 100755
index 4ed94877df2..00000000000
--- a/3rdparty/Sabre/CalDAV/Property/Invite.php
+++ /dev/null
@@ -1,173 +0,0 @@
-<?php
-
-use Sabre_CalDAV_SharingPlugin as SharingPlugin;
-
-/**
- * Invite property
- *
- * This property encodes the 'invite' property, as defined by
- * the 'caldav-sharing-02' spec, in the http://calendarserver.org/ns/
- * namespace.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @see https://trac.calendarserver.org/browser/CalendarServer/trunk/doc/Extensions/caldav-sharing-02.txt
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Sabre_CalDAV_Property_Invite extends Sabre_DAV_Property {
-
-    /**
-     * The list of users a calendar has been shared to.
-     *
-     * @var array
-     */
-    protected $users;
-
-    /**
-     * Creates the property.
-     *
-     * Users is an array. Each element of the array has the following
-     * properties:
-     *
-     *   * href - Often a mailto: address
-     *   * commonName - Optional, for example a first and lastname for a user.
-     *   * status - One of the SharingPlugin::STATUS_* constants.
-     *   * readOnly - true or false
-     *   * summary - Optional, description of the share
-     *
-     * @param array $users
-     */
-    public function __construct(array $users) {
-
-        $this->users = $users;
-
-    }
-
-    /**
-     * Returns the list of users, as it was passed to the constructor.
-     *
-     * @return array
-     */
-    public function getValue() {
-
-        return $this->users;
-
-    }
-
-    /**
-     * Serializes the property in a DOMDocument
-     *
-     * @param Sabre_DAV_Server $server
-     * @param DOMElement $node
-     * @return void
-     */
-    public function serialize(Sabre_DAV_Server $server,DOMElement $node) {
-
-       $doc = $node->ownerDocument;
-       foreach($this->users as $user) {
-
-           $xuser = $doc->createElement('cs:user');
-
-           $href = $doc->createElement('d:href');
-           $href->appendChild($doc->createTextNode($user['href']));
-           $xuser->appendChild($href);
-
-           if (isset($user['commonName']) && $user['commonName']) {
-               $commonName = $doc->createElement('cs:common-name');
-               $commonName->appendChild($doc->createTextNode($user['commonName']));
-               $xuser->appendChild($commonName);
-           }
-
-           switch($user['status']) {
-
-               case SharingPlugin::STATUS_ACCEPTED :
-                   $status = $doc->createElement('cs:invite-accepted');
-                   $xuser->appendChild($status);
-                   break;
-               case SharingPlugin::STATUS_DECLINED :
-                   $status = $doc->createElement('cs:invite-declined');
-                   $xuser->appendChild($status);
-                   break;
-               case SharingPlugin::STATUS_NORESPONSE :
-                   $status = $doc->createElement('cs:invite-noresponse');
-                   $xuser->appendChild($status);
-                   break;
-               case SharingPlugin::STATUS_INVALID :
-                   $status = $doc->createElement('cs:invite-invalid');
-                   $xuser->appendChild($status);
-                   break;
-
-           }
-
-           $xaccess = $doc->createElement('cs:access');
-
-           if ($user['readOnly']) {
-                $xaccess->appendChild(
-                    $doc->createElement('cs:read')
-                );
-           } else {
-                $xaccess->appendChild(
-                    $doc->createElement('cs:read-write')
-                );
-           }
-           $xuser->appendChild($xaccess);
-
-           if (isset($user['summary']) && $user['summary']) {
-               $summary = $doc->createElement('cs:summary');
-               $summary->appendChild($doc->createTextNode($user['summary']));
-               $xuser->appendChild($summary);
-           }
-
-           $node->appendChild($xuser);
-
-       }
-
-    }
-
-    /**
-     * Unserializes the property.
-     *
-     * This static method should return a an instance of this object.
-     *
-     * @param DOMElement $prop
-     * @return Sabre_DAV_IProperty
-     */
-    static function unserialize(DOMElement $prop) {
-
-        $xpath = new \DOMXPath($prop->ownerDocument);
-        $xpath->registerNamespace('cs', Sabre_CalDAV_Plugin::NS_CALENDARSERVER);
-        $xpath->registerNamespace('d',  'DAV:');
-
-        $users = array();
-
-        foreach($xpath->query('cs:user', $prop) as $user) {
-
-            $status = null;
-            if ($xpath->evaluate('boolean(cs:invite-accepted)', $user)) {
-                $status = SharingPlugin::STATUS_ACCEPTED;
-            } elseif ($xpath->evaluate('boolean(cs:invite-declined)', $user)) {
-                $status = SharingPlugin::STATUS_DECLINED;
-            } elseif ($xpath->evaluate('boolean(cs:invite-noresponse)', $user)) {
-                $status = SharingPlugin::STATUS_NORESPONSE;
-            } elseif ($xpath->evaluate('boolean(cs:invite-invalid)', $user)) {
-                $status = SharingPlugin::STATUS_INVALID;
-            } else {
-                throw new Sabre_DAV_Exception('Every cs:user property must have one of cs:invite-accepted, cs:invite-declined, cs:invite-noresponse or cs:invite-invalid');
-            }
-            $users[] = array(
-                'href' => $xpath->evaluate('string(d:href)', $user),
-                'commonName' => $xpath->evaluate('string(cs:common-name)', $user),
-                'readOnly' => $xpath->evaluate('boolean(cs:access/cs:read)', $user),
-                'summary' => $xpath->evaluate('string(cs:summary)', $user),
-                'status' => $status,
-            );
-
-        }
-
-        return new self($users);
-
-    }
-
-}
diff --git a/3rdparty/Sabre/CalDAV/Property/ScheduleCalendarTransp.php b/3rdparty/Sabre/CalDAV/Property/ScheduleCalendarTransp.php
deleted file mode 100755
index 76c1dbaec21..00000000000
--- a/3rdparty/Sabre/CalDAV/Property/ScheduleCalendarTransp.php
+++ /dev/null
@@ -1,99 +0,0 @@
-<?php
-
-/**
- * schedule-calendar-transp property.
- *
- * This property is a representation of the schedule-calendar-transp property.
- * This property is defined in RFC6638 (caldav scheduling).
- *
- * Its values are either 'transparent' or 'opaque'. If it's transparent, it
- * means that this calendar will not be taken into consideration when a
- * different user queries for free-busy information. If it's 'opaque', it will.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Sabre_CalDAV_Property_ScheduleCalendarTransp extends Sabre_DAV_Property {
-
-    const TRANSPARENT = 'transparent';
-    const OPAQUE = 'opaque';
-
-    protected $value;
-
-    /**
-     * Creates the property
-     *
-     * @param string $value
-     */
-    public function __construct($value) {
-
-        if ($value !== self::TRANSPARENT && $value !== self::OPAQUE) {
-            throw new \InvalidArgumentException('The value must either be specified as "transparent" or "opaque"');
-        }
-        $this->value = $value;
-
-    }
-
-    /**
-     * Returns the current value
-     *
-     * @return string
-     */
-    public function getValue() {
-
-        return $this->value;
-
-    }
-
-    /**
-     * Serializes the property in a DOMDocument
-     *
-     * @param Sabre_DAV_Server $server
-     * @param DOMElement $node
-     * @return void
-     */
-    public function serialize(Sabre_DAV_Server $server,DOMElement $node) {
-
-        $doc = $node->ownerDocument;
-        switch($this->value) {
-            case self::TRANSPARENT :
-                $xval = $doc->createElement('cal:transparent');
-                break;
-            case self::OPAQUE :
-                $xval = $doc->createElement('cal:opaque');
-                break;
-        }
-
-        $node->appendChild($xval);
-
-    }
-
-    /**
-     * Unserializes the DOMElement back into a Property class.
-     *
-     * @param DOMElement $node
-     * @return Sabre_CalDAV_Property_ScheduleCalendarTransp
-     */
-    static function unserialize(DOMElement $node) {
-
-        $value = null;
-        foreach($node->childNodes as $childNode) {
-            switch(Sabre_DAV_XMLUtil::toClarkNotation($childNode)) {
-                case '{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}opaque' :
-                    $value = self::OPAQUE;
-                    break;
-                case '{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}transparent' :
-                    $value = self::TRANSPARENT;
-                    break;
-            }
-        }
-        if (is_null($value))
-           return null;
-
-        return new self($value);
-
-    }
-}
diff --git a/3rdparty/Sabre/CalDAV/Schedule/IMip.php b/3rdparty/Sabre/CalDAV/Schedule/IMip.php
index 92c3c097c15..37e75fcc4a7 100755
--- a/3rdparty/Sabre/CalDAV/Schedule/IMip.php
+++ b/3rdparty/Sabre/CalDAV/Schedule/IMip.php
@@ -1,7 +1,5 @@
 <?php
 
-use Sabre\VObject;
-
 /**
  * iMIP handler.
  *
@@ -44,13 +42,12 @@ class Sabre_CalDAV_Schedule_IMip {
     /**
      * Sends one or more iTip messages through email.
      *
-     * @param string $originator Originator Email
-     * @param array $recipients Array of email addresses
-     * @param Sabre\VObject\Component $vObject
-     * @param string $principal Principal Url of the originator
+     * @param string $originator
+     * @param array $recipients
+     * @param Sabre_VObject_Component $vObject
      * @return void
      */
-    public function sendMessage($originator, array $recipients, VObject\Component $vObject, $principal) {
+    public function sendMessage($originator, array $recipients, Sabre_VObject_Component $vObject) {
 
         foreach($recipients as $recipient) {
 
@@ -86,9 +83,6 @@ class Sabre_CalDAV_Schedule_IMip {
 
     }
 
-    // @codeCoverageIgnoreStart
-    // This is deemed untestable in a reasonable manner
-
     /**
      * This function is reponsible for sending the actual email.
      *
@@ -100,11 +94,11 @@ class Sabre_CalDAV_Schedule_IMip {
      */
     protected function mail($to, $subject, $body, array $headers) {
 
-
         mail($to, $subject, $body, implode("\r\n", $headers));
 
     }
 
-    // @codeCoverageIgnoreEnd
 
 }
+
+?>
diff --git a/3rdparty/Sabre/CalDAV/Schedule/Outbox.php b/3rdparty/Sabre/CalDAV/Schedule/Outbox.php
index 462aa527e23..014c37230d1 100755
--- a/3rdparty/Sabre/CalDAV/Schedule/Outbox.php
+++ b/3rdparty/Sabre/CalDAV/Schedule/Outbox.php
@@ -13,7 +13,7 @@
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
  */
-class Sabre_CalDAV_Schedule_Outbox extends Sabre_DAV_Collection implements Sabre_CalDAV_Schedule_IOutbox {
+class Sabre_CalDAV_Schedule_Outbox extends Sabre_DAV_Directory implements Sabre_CalDAV_Schedule_IOutbox {
 
     /**
      * The principal Uri
@@ -103,11 +103,6 @@ class Sabre_CalDAV_Schedule_Outbox extends Sabre_DAV_Collection implements Sabre
                 'principal' => $this->getOwner(),
                 'protected' => true,
             ),
-            array(
-                'privilege' => '{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}schedule-post-vevent',
-                'principal' => $this->getOwner(),
-                'protected' => true,
-            ),
             array(
                 'privilege' => '{DAV:}read',
                 'principal' => $this->getOwner(),
@@ -149,9 +144,6 @@ class Sabre_CalDAV_Schedule_Outbox extends Sabre_DAV_Collection implements Sabre
         $default['aggregates'][] = array(
             'privilege' => '{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}schedule-query-freebusy',
         );
-        $default['aggregates'][] = array(
-            'privilege' => '{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}schedule-post-vevent',
-        );
 
         return $default;
 
diff --git a/3rdparty/Sabre/CalDAV/Server.php b/3rdparty/Sabre/CalDAV/Server.php
new file mode 100755
index 00000000000..325e3d80a7f
--- /dev/null
+++ b/3rdparty/Sabre/CalDAV/Server.php
@@ -0,0 +1,68 @@
+<?php
+
+/**
+ * CalDAV server
+ *
+ * Deprecated! Warning: This class is now officially deprecated
+ *
+ * This script is a convenience script. It quickly sets up a WebDAV server
+ * with caldav and ACL support, and it creates the root 'principals' and
+ * 'calendars' collections.
+ *
+ * Note that if you plan to do anything moderately complex, you are advised to
+ * not subclass this server, but use Sabre_DAV_Server directly instead. This
+ * class is nothing more than an 'easy setup'.
+ *
+ * @package Sabre
+ * @subpackage CalDAV
+ * @deprecated Don't use this class anymore, it will be removed in version 1.7.
+ * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
+ * @author Evert Pot (http://www.rooftopsolutions.nl/) 
+ * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
+ */
+class Sabre_CalDAV_Server extends Sabre_DAV_Server {
+
+    /**
+     * The authentication realm
+     *
+     * Note that if this changes, the hashes in the auth backend must also
+     * be recalculated.
+     *
+     * @var string
+     */
+    public $authRealm = 'SabreDAV';
+
+    /**
+     * Sets up the object. A PDO object must be passed to setup all the backends.
+     *
+     * @param PDO $pdo
+     */
+    public function __construct(PDO $pdo) {
+
+        /* Backends */
+        $authBackend = new Sabre_DAV_Auth_Backend_PDO($pdo);
+        $calendarBackend = new Sabre_CalDAV_Backend_PDO($pdo);
+        $principalBackend = new Sabre_DAVACL_PrincipalBackend_PDO($pdo);
+
+        /* Directory structure */
+        $tree = array(
+            new Sabre_CalDAV_Principal_Collection($principalBackend),
+            new Sabre_CalDAV_CalendarRootNode($principalBackend, $calendarBackend),
+        );
+
+        /* Initializing server */
+        parent::__construct($tree);
+
+        /* Server Plugins */
+        $authPlugin = new Sabre_DAV_Auth_Plugin($authBackend,$this->authRealm);
+        $this->addPlugin($authPlugin);
+
+        $aclPlugin = new Sabre_DAVACL_Plugin();
+        $this->addPlugin($aclPlugin);
+
+        $caldavPlugin = new Sabre_CalDAV_Plugin();
+        $this->addPlugin($caldavPlugin);
+
+    }
+
+}
diff --git a/3rdparty/Sabre/CalDAV/ShareableCalendar.php b/3rdparty/Sabre/CalDAV/ShareableCalendar.php
deleted file mode 100755
index 0e44885c621..00000000000
--- a/3rdparty/Sabre/CalDAV/ShareableCalendar.php
+++ /dev/null
@@ -1,72 +0,0 @@
-<?php
-
-/**
- * This object represents a CalDAV calendar that can be shared with other
- * users.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Sabre_CalDAV_ShareableCalendar extends Sabre_CalDAV_Calendar implements Sabre_CalDAV_IShareableCalendar {
-
-    /**
-     * Updates the list of shares.
-     *
-     * The first array is a list of people that are to be added to the
-     * calendar.
-     *
-     * Every element in the add array has the following properties:
-     *   * href - A url. Usually a mailto: address
-     *   * commonName - Usually a first and last name, or false
-     *   * summary - A description of the share, can also be false
-     *   * readOnly - A boolean value
-     *
-     * Every element in the remove array is just the address string.
-     *
-     * @param array $add
-     * @param array $remove
-     * @return void
-     */
-    public function updateShares(array $add, array $remove) {
-
-        $this->caldavBackend->updateShares($this->calendarInfo['id'], $add, $remove);
-
-    }
-
-    /**
-     * Returns the list of people whom this calendar is shared with.
-     *
-     * Every element in this array should have the following properties:
-     *   * href - Often a mailto: address
-     *   * commonName - Optional, for example a first + last name
-     *   * status - See the Sabre_CalDAV_SharingPlugin::STATUS_ constants.
-     *   * readOnly - boolean
-     *   * summary - Optional, a description for the share
-     *
-     * @return array
-     */
-    public function getShares() {
-
-        return $this->caldavBackend->getShares($this->calendarInfo['id']);
-
-    }
-
-    /**
-     * Marks this calendar as published.
-     *
-     * Publishing a calendar should automatically create a read-only, public,
-     * subscribable calendar.
-     *
-     * @param bool $value
-     * @return void
-     */
-    public function setPublishStatus($value) {
-
-        $this->caldavBackend->setPublishStatus($this->calendarInfo['id'], $value);
-
-    }
-
-}
diff --git a/3rdparty/Sabre/CalDAV/SharedCalendar.php b/3rdparty/Sabre/CalDAV/SharedCalendar.php
deleted file mode 100755
index 9000697d3ec..00000000000
--- a/3rdparty/Sabre/CalDAV/SharedCalendar.php
+++ /dev/null
@@ -1,98 +0,0 @@
-<?php
-
-/**
- * This object represents a CalDAV calendar that is shared by a different user.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Sabre_CalDAV_SharedCalendar extends Sabre_CalDAV_Calendar implements Sabre_CalDAV_ISharedCalendar {
-
-    /**
-     * Constructor
-     *
-     * @param Sabre_DAVACL_IPrincipalBackend $principalBackend
-     * @param Sabre_CalDAV_Backend_BackendInterface $caldavBackend
-     * @param array $calendarInfo
-     */
-    public function __construct(Sabre_DAVACL_IPrincipalBackend $principalBackend, Sabre_CalDAV_Backend_BackendInterface $caldavBackend, $calendarInfo) {
-
-        $required = array(
-            '{http://calendarserver.org/ns/}shared-url',
-            '{http://sabredav.org/ns}owner-principal',
-            '{http://sabredav.org/ns}read-only',
-        );
-        foreach($required as $r) {
-            if (!isset($calendarInfo[$r])) {
-                throw new InvalidArgumentException('The ' . $r . ' property must be specified for SharedCalendar(s)');
-            }
-        }
-
-        parent::__construct($principalBackend, $caldavBackend, $calendarInfo);
-
-    }
-
-    /**
-     * This method should return the url of the owners' copy of the shared
-     * calendar.
-     *
-     * @return string
-     */
-    public function getSharedUrl() {
-
-        return $this->calendarInfo['{http://calendarserver.org/ns/}shared-url'];
-
-    }
-
-    /**
-     * Returns the owner principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public function getOwner() {
-
-        return $this->calendarInfo['{http://sabredav.org/ns}owner-principal'];
-
-    }
-
-    /**
-     * Returns a list of ACE's for this node.
-     *
-     * Each ACE has the following properties:
-     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
-     *     currently the only supported privileges
-     *   * 'principal', a url to the principal who owns the node
-     *   * 'protected' (optional), indicating that this ACE is not allowed to
-     *      be updated.
-     *
-     * @return array
-     */
-    public function getACL() {
-
-        // The top-level ACL only contains access information for the true
-        // owner of the calendar, so we need to add the information for the
-        // sharee.
-        $acl = parent::getACL();
-        $acl[] = array(
-            'privilege' => '{DAV:}read',
-            'principal' => $this->calendarInfo['principaluri'],
-            'protected' => true,
-        );
-        if (!$this->calendarInfo['{http://sabredav.org/ns}read-only']) {
-            $acl[] = array(
-                'privilege' => '{DAV:}write',
-                'principal' => $this->calendarInfo['principaluri'],
-                'protected' => true,
-            );
-        }
-        return $acl;
-
-    }
-
-
-}
diff --git a/3rdparty/Sabre/CalDAV/SharingPlugin.php b/3rdparty/Sabre/CalDAV/SharingPlugin.php
deleted file mode 100755
index 31df8057b24..00000000000
--- a/3rdparty/Sabre/CalDAV/SharingPlugin.php
+++ /dev/null
@@ -1,475 +0,0 @@
-<?php
-
-/**
- * This plugin implements support for caldav sharing.
- *
- * This spec is defined at:
- * http://svn.calendarserver.org/repository/calendarserver/CalendarServer/trunk/doc/Extensions/caldav-sharing.txt
- *
- * See:
- * Sabre_CalDAV_Backend_SharingSupport for all the documentation.
- *
- * Note: This feature is experimental, and may change in between different
- * SabreDAV versions.
- *
- * @package Sabre
- * @subpackage CalDAV
- * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Sabre_CalDAV_SharingPlugin extends Sabre_DAV_ServerPlugin {
-
-    /**
-     * These are the various status constants used by sharing-messages.
-     */
-    const STATUS_ACCEPTED = 1;
-    const STATUS_DECLINED = 2;
-    const STATUS_DELETED = 3;
-    const STATUS_NORESPONSE = 4;
-    const STATUS_INVALID = 5;
-
-    /**
-     * Reference to SabreDAV server object.
-     *
-     * @var Sabre_DAV_Server
-     */
-    protected $server;
-
-    /**
-     * This method should return a list of server-features.
-     *
-     * This is for example 'versioning' and is added to the DAV: header
-     * in an OPTIONS response.
-     *
-     * @return array
-     */
-    public function getFeatures() {
-
-        return array('calendarserver-sharing');
-
-    }
-
-    /**
-     * Returns a plugin name.
-     *
-     * Using this name other plugins will be able to access other plugins
-     * using Sabre_DAV_Server::getPlugin
-     *
-     * @return string
-     */
-    public function getPluginName() {
-
-        return 'caldav-sharing';
-
-    }
-
-    /**
-     * This initializes the plugin.
-     *
-     * This function is called by Sabre_DAV_Server, after
-     * addPlugin is called.
-     *
-     * This method should set up the required event subscriptions.
-     *
-     * @param Sabre_DAV_Server $server
-     * @return void
-     */
-    public function initialize(Sabre_DAV_Server $server) {
-
-        $this->server = $server;
-        //$server->resourceTypeMapping['Sabre_CalDAV_IShareableCalendar'] = '{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}shared-owner';
-        $server->resourceTypeMapping['Sabre_CalDAV_ISharedCalendar'] = '{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}shared';
-
-        array_push(
-            $this->server->protectedProperties,
-            '{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}invite',
-            '{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}allowed-sharing-modes',
-            '{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}shared-url'
-        );
-
-        $this->server->subscribeEvent('beforeGetProperties', array($this, 'beforeGetProperties'));
-        $this->server->subscribeEvent('afterGetProperties', array($this, 'afterGetProperties'));
-        $this->server->subscribeEvent('updateProperties', array($this, 'updateProperties'));
-        $this->server->subscribeEvent('unknownMethod', array($this,'unknownMethod'));
-
-    }
-
-    /**
-     * This event is triggered when properties are requested for a certain
-     * node.
-     *
-     * This allows us to inject any properties early.
-     *
-     * @param string $path
-     * @param Sabre_DAV_INode $node
-     * @param array $requestedProperties
-     * @param array $returnedProperties
-     * @return void
-     */
-    public function beforeGetProperties($path, Sabre_DAV_INode $node, &$requestedProperties, &$returnedProperties) {
-
-        if ($node instanceof Sabre_CalDAV_IShareableCalendar) {
-            if (($index = array_search('{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}invite', $requestedProperties))!==false) {
-
-                unset($requestedProperties[$index]);
-                $returnedProperties[200]['{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}invite'] =
-                    new Sabre_CalDAV_Property_Invite(
-                        $node->getShares()
-                    );
-
-            }
-
-        }
-        if ($node instanceof Sabre_CalDAV_ISharedCalendar) {
-            if (($index = array_search('{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}shared-url', $requestedProperties))!==false) {
-
-                unset($requestedProperties[$index]);
-                $returnedProperties[200]['{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}shared-url'] =
-                    new Sabre_DAV_Property_Href(
-                        $node->getSharedUrl()
-                    );
-
-            }
-
-        }
-
-    }
-
-    /**
-     * This method is triggered *after* all properties have been retrieved.
-     * This allows us to inject the correct resourcetype for calendars that
-     * have been shared.
-     *
-     * @param string $path
-     * @param array $properties
-     * @param Sabre_DAV_INode $node
-     * @return void
-     */
-    public function afterGetProperties($path, &$properties, Sabre_DAV_INode $node) {
-
-        if ($node instanceof Sabre_CalDAV_IShareableCalendar) {
-            if (isset($properties[200]['{DAV:}resourcetype'])) {
-                if (count($node->getShares())>0) {
-                    $properties[200]['{DAV:}resourcetype']->add(
-                        '{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}shared-owner'
-                    );
-                }
-            }
-            $propName = '{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}allowed-sharing-modes';
-            if (array_key_exists($propName, $properties[404])) {
-                unset($properties[404][$propName]);
-                $properties[200][$propName] = new Sabre_CalDAV_Property_AllowedSharingModes(true,false);
-            }
-
-        }
-
-    }
-
-    /**
-     * This method is trigged when a user attempts to update a node's
-     * properties.
-     *
-     * A previous draft of the sharing spec stated that it was possible to use
-     * PROPPATCH to remove 'shared-owner' from the resourcetype, thus unsharing
-     * the calendar.
-     *
-     * Even though this is no longer in the current spec, we keep this around
-     * because OS X 10.7 may still make use of this feature.
-     *
-     * @param array $mutations
-     * @param array $result
-     * @param Sabre_DAV_INode $node
-     * @return void
-     */
-    public function updateProperties(array &$mutations, array &$result, Sabre_DAV_INode $node) {
-
-        if (!$node instanceof Sabre_CalDAV_IShareableCalendar)
-            return;
-
-        if (!isset($mutations['{DAV:}resourcetype'])) {
-            return;
-        }
-
-        // Only doing something if shared-owner is indeed not in the list.
-        if($mutations['{DAV:}resourcetype']->is('{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}shared-owner')) return; 
-
-        $shares = $node->getShares();
-        $remove = array();
-        foreach($shares as $share) {
-            $remove[] = $share['href'];
-        }
-        $node->updateShares(array(), $remove);
-
-        // We're marking this update as 200 OK
-        $result[200]['{DAV:}resourcetype'] = null;
-
-        // Removing it from the mutations list
-        unset($mutations['{DAV:}resourcetype']);
-
-    }
-
-    /**
-     * This event is triggered when the server didn't know how to handle a
-     * certain request.
-     *
-     * We intercept this to handle POST requests on calendars.
-     *
-     * @param string $method
-     * @param string $uri
-     * @return null|bool
-     */
-    public function unknownMethod($method, $uri) {
-
-        if ($method!=='POST') {
-            return;
-        }
-
-        // Only handling xml
-        $contentType = $this->server->httpRequest->getHeader('Content-Type');
-        if (strpos($contentType,'application/xml')===false && strpos($contentType,'text/xml')===false)
-            return;
-
-        // Making sure the node exists
-        try {
-            $node = $this->server->tree->getNodeForPath($uri);
-        } catch (Sabre_DAV_Exception_NotFound $e) {
-            return;
-        }
-
-
-        $dom = Sabre_DAV_XMLUtil::loadDOMDocument($this->server->httpRequest->getBody(true));
-
-        $documentType = Sabre_DAV_XMLUtil::toClarkNotation($dom->firstChild);
-
-        switch($documentType) {
-
-            // Dealing with the 'share' document, which modified invitees on a
-            // calendar.
-            case '{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}share' :
-
-                // We can only deal with IShareableCalendar objects
-                if (!$node instanceof Sabre_CalDAV_IShareableCalendar) {
-                    return;
-                }
-
-                // Getting ACL info
-                $acl = $this->server->getPlugin('acl');
-
-                // If there's no ACL support, we allow everything
-                if ($acl) {
-                    $acl->checkPrivileges($uri, '{DAV:}write');
-                }
-
-                $mutations = $this->parseShareRequest($dom);
-
-                $node->updateShares($mutations[0], $mutations[1]);
-
-                $this->server->httpResponse->sendStatus(200);
-                // Adding this because sending a response body may cause issues,
-                // and I wanted some type of indicator the response was handled.
-                $this->server->httpResponse->setHeader('X-Sabre-Status', 'everything-went-well');
-
-                // Breaking the event chain
-                return false;
-
-            // The invite-reply document is sent when the user replies to an
-            // invitation of a calendar share.
-            case '{'. Sabre_CalDAV_Plugin::NS_CALENDARSERVER.'}invite-reply' :
-
-                // This only works on the calendar-home-root node.
-                if (!$node instanceof Sabre_CalDAV_UserCalendars) {
-                    return;
-                }
-
-                // Getting ACL info
-                $acl = $this->server->getPlugin('acl');
-
-                // If there's no ACL support, we allow everything
-                if ($acl) {
-                    $acl->checkPrivileges($uri, '{DAV:}write');
-                }
-
-                $message = $this->parseInviteReplyRequest($dom);
-
-                $url = $node->shareReply(
-                    $message['href'],
-                    $message['status'],
-                    $message['calendarUri'],
-                    $message['inReplyTo'],
-                    $message['summary']
-                );
-
-                $this->server->httpResponse->sendStatus(200);
-                // Adding this because sending a response body may cause issues,
-                // and I wanted some type of indicator the response was handled.
-                $this->server->httpResponse->setHeader('X-Sabre-Status', 'everything-went-well');
-
-                if ($url) {
-                    $dom = new DOMDocument('1.0', 'UTF-8');
-                    $dom->formatOutput = true;
-
-                    $root = $dom->createElement('cs:shared-as');
-                    foreach($this->server->xmlNamespaces as $namespace => $prefix) {
-                        $root->setAttribute('xmlns:' . $prefix, $namespace);
-                    }
-
-                    $dom->appendChild($root);
-                    $href = new Sabre_DAV_Property_Href($url);
-
-                    $href->serialize($this->server, $root);
-                    $this->server->httpResponse->setHeader('Content-Type','application/xml');
-                    $this->server->httpResponse->sendBody($dom->saveXML());
-
-                }
-
-                // Breaking the event chain
-                return false;
-
-            case '{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}publish-calendar' :
-
-                // We can only deal with IShareableCalendar objects
-                if (!$node instanceof Sabre_CalDAV_IShareableCalendar) {
-                    return;
-                }
-
-                // Getting ACL info
-                $acl = $this->server->getPlugin('acl');
-
-                // If there's no ACL support, we allow everything
-                if ($acl) {
-                    $acl->checkPrivileges($uri, '{DAV:}write');
-                }
-
-                $node->setPublishStatus(true);
-
-                // iCloud sends back the 202, so we will too.
-                $this->server->httpResponse->sendStatus(202);
-
-                // Adding this because sending a response body may cause issues,
-                // and I wanted some type of indicator the response was handled.
-                $this->server->httpResponse->setHeader('X-Sabre-Status', 'everything-went-well');
-
-                // Breaking the event chain
-                return false;
-
-            case '{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}unpublish-calendar' :
-
-                // We can only deal with IShareableCalendar objects
-                if (!$node instanceof Sabre_CalDAV_IShareableCalendar) {
-                    return;
-                }
-
-                // Getting ACL info
-                $acl = $this->server->getPlugin('acl');
-
-                // If there's no ACL support, we allow everything
-                if ($acl) {
-                    $acl->checkPrivileges($uri, '{DAV:}write');
-                }
-
-                $node->setPublishStatus(false);
-
-                $this->server->httpResponse->sendStatus(200);
-
-                // Adding this because sending a response body may cause issues,
-                // and I wanted some type of indicator the response was handled.
-                $this->server->httpResponse->setHeader('X-Sabre-Status', 'everything-went-well');
-
-                // Breaking the event chain
-                return false;
-
-        }
-
-
-    }
-
-    /**
-     * Parses the 'share' POST request.
-     *
-     * This method returns an array, containing two arrays.
-     * The first array is a list of new sharees. Every element is a struct
-     * containing a:
-     *   * href element. (usually a mailto: address)
-     *   * commonName element (often a first and lastname, but can also be
-     *     false)
-     *   * readOnly (true or false)
-     *   * summary (A description of the share, can also be false)
-     *
-     * The second array is a list of sharees that are to be removed. This is
-     * just a simple array with 'hrefs'.
-     *
-     * @param DOMDocument $dom
-     * @return array
-     */
-    protected function parseShareRequest(DOMDocument $dom) {
-
-        $xpath = new \DOMXPath($dom);
-        $xpath->registerNamespace('cs', Sabre_CalDAV_Plugin::NS_CALENDARSERVER);
-        $xpath->registerNamespace('d', 'DAV:');
-
-
-        $set = array();
-        $elems = $xpath->query('cs:set');
-
-        for($i=0; $i < $elems->length; $i++) {
-
-            $xset = $elems->item($i);
-            $set[] = array(
-                'href' => $xpath->evaluate('string(d:href)', $xset),
-                'commonName' => $xpath->evaluate('string(cs:common-name)', $xset),
-                'summary' => $xpath->evaluate('string(cs:summary)', $xset),
-                'readOnly' => $xpath->evaluate('boolean(cs:read)', $xset)!==false
-            );
-
-        }
-
-        $remove = array();
-        $elems = $xpath->query('cs:remove');
-
-        for($i=0; $i < $elems->length; $i++) {
-
-            $xremove = $elems->item($i);
-            $remove[] = $xpath->evaluate('string(d:href)', $xremove);
-
-        }
-
-        return array($set, $remove);
-
-    }
-
-    /**
-     * Parses the 'invite-reply' POST request.
-     *
-     * This method returns an array, containing the following properties:
-     *   * href - The sharee who is replying
-     *   * status - One of the self::STATUS_* constants
-     *   * calendarUri - The url of the shared calendar
-     *   * inReplyTo - The unique id of the share invitation.
-     *   * summary - Optional description of the reply.
-     *
-     * @param DOMDocument $dom
-     * @return array
-     */
-    protected function parseInviteReplyRequest(DOMDocument $dom) {
-
-        $xpath = new \DOMXPath($dom);
-        $xpath->registerNamespace('cs', Sabre_CalDAV_Plugin::NS_CALENDARSERVER);
-        $xpath->registerNamespace('d', 'DAV:');
-
-        $hostHref = $xpath->evaluate('string(cs:hosturl/d:href)');
-        if (!$hostHref) {
-            throw new Sabre_DAV_Exception_BadRequest('The {' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}hosturl/{DAV:}href element is required');
-        }
-
-        return array(
-            'href' => $xpath->evaluate('string(d:href)'),
-            'calendarUri' => $this->server->calculateUri($hostHref),
-            'inReplyTo' => $xpath->evaluate('string(cs:in-reply-to)'),
-            'summary' => $xpath->evaluate('string(cs:summary)'),
-            'status' => $xpath->evaluate('boolean(cs:invite-accepted)')?self::STATUS_ACCEPTED:self::STATUS_DECLINED
-        );
-
-    }
-
-}
diff --git a/3rdparty/Sabre/CalDAV/UserCalendars.php b/3rdparty/Sabre/CalDAV/UserCalendars.php
index 3194e6677ab..b8d3f0573fa 100755
--- a/3rdparty/Sabre/CalDAV/UserCalendars.php
+++ b/3rdparty/Sabre/CalDAV/UserCalendars.php
@@ -6,7 +6,7 @@
  * @package Sabre
  * @subpackage CalDAV
  * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
- * @author Evert Pot (http://www.rooftopsolutions.nl/)
+ * @author Evert Pot (http://www.rooftopsolutions.nl/) 
  * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
  */
 class Sabre_CalDAV_UserCalendars implements Sabre_DAV_IExtendedCollection, Sabre_DAVACL_IACL {
@@ -21,7 +21,7 @@ class Sabre_CalDAV_UserCalendars implements Sabre_DAV_IExtendedCollection, Sabre
     /**
      * CalDAV backend
      *
-     * @var Sabre_CalDAV_Backend_BackendInterface
+     * @var Sabre_CalDAV_Backend_Abstract
      */
     protected $caldavBackend;
 
@@ -36,10 +36,10 @@ class Sabre_CalDAV_UserCalendars implements Sabre_DAV_IExtendedCollection, Sabre
      * Constructor
      *
      * @param Sabre_DAVACL_IPrincipalBackend $principalBackend
-     * @param Sabre_CalDAV_Backend_BackendInterface $caldavBackend
+     * @param Sabre_CalDAV_Backend_Abstract $caldavBackend
      * @param mixed $userUri
      */
-    public function __construct(Sabre_DAVACL_IPrincipalBackend $principalBackend, Sabre_CalDAV_Backend_BackendInterface $caldavBackend, $userUri) {
+    public function __construct(Sabre_DAVACL_IPrincipalBackend $principalBackend, Sabre_CalDAV_Backend_Abstract $caldavBackend, $userUri) {
 
         $this->principalBackend = $principalBackend;
         $this->caldavBackend = $caldavBackend;
@@ -168,22 +168,9 @@ class Sabre_CalDAV_UserCalendars implements Sabre_DAV_IExtendedCollection, Sabre
         $calendars = $this->caldavBackend->getCalendarsForUser($this->principalInfo['uri']);
         $objs = array();
         foreach($calendars as $calendar) {
-            if ($this->caldavBackend instanceof Sabre_CalDAV_Backend_SharingSupport) {
-                if (isset($calendar['{http://calendarserver.org/ns/}shared-url'])) {
-                    $objs[] = new Sabre_CalDAV_SharedCalendar($this->principalBackend, $this->caldavBackend, $calendar);
-                } else {
-                    $objs[] = new Sabre_CalDAV_ShareableCalendar($this->principalBackend, $this->caldavBackend, $calendar);
-                }
-            } else {
-                $objs[] = new Sabre_CalDAV_Calendar($this->principalBackend, $this->caldavBackend, $calendar);
-            }
+            $objs[] = new Sabre_CalDAV_Calendar($this->principalBackend, $this->caldavBackend, $calendar);
         }
         $objs[] = new Sabre_CalDAV_Schedule_Outbox($this->principalInfo['uri']);
-
-        // We're adding a notifications node, if it's supported by the backend.
-        if ($this->caldavBackend instanceof Sabre_CalDAV_Backend_NotificationSupport) {
-            $objs[] = new Sabre_CalDAV_Notifications_Collection($this->caldavBackend, $this->principalInfo['uri']);
-        }
         return $objs;
 
     }
@@ -198,22 +185,8 @@ class Sabre_CalDAV_UserCalendars implements Sabre_DAV_IExtendedCollection, Sabre
      */
     public function createExtendedCollection($name, array $resourceType, array $properties) {
 
-        $isCalendar = false;
-        foreach($resourceType as $rt) {
-            switch ($rt) {
-                case '{DAV:}collection' :
-                case '{http://calendarserver.org/ns/}shared-owner' :
-                    // ignore
-                    break;
-                case '{urn:ietf:params:xml:ns:caldav}calendar' :
-                    $isCalendar = true;
-                    break;
-                default :
-                    throw new Sabre_DAV_Exception_InvalidResourceType('Unknown resourceType: ' . $rt);
-            }
-        }
-        if (!$isCalendar) {
-            throw new Sabre_DAV_Exception_InvalidResourceType('You can only create calendars in this collection');
+        if (!in_array('{urn:ietf:params:xml:ns:caldav}calendar',$resourceType) || count($resourceType)!==2) {
+            throw new Sabre_DAV_Exception_InvalidResourceType('Unknown resourceType for this collection');
         }
         $this->caldavBackend->createCalendar($this->principalInfo['uri'], $name, $properties);
 
@@ -322,27 +295,4 @@ class Sabre_CalDAV_UserCalendars implements Sabre_DAV_IExtendedCollection, Sabre
 
     }
 
-    /**
-     * This method is called when a user replied to a request to share.
-     *
-     * This method should return the url of the newly created calendar if the
-     * share was accepted.
-     *
-     * @param string href The sharee who is replying (often a mailto: address)
-     * @param int status One of the SharingPlugin::STATUS_* constants
-     * @param string $calendarUri The url to the calendar thats being shared
-     * @param string $inReplyTo The unique id this message is a response to
-     * @param string $summary A description of the reply
-     * @return null|string
-     */
-    public function shareReply($href, $status, $calendarUri, $inReplyTo, $summary = null) {
-
-        if (!$this->caldavBackend instanceof Sabre_CalDAV_Backend_SharingSupport) {
-            throw new Sabre_DAV_Exception_NotImplemented('Sharing support is not implemented by this backend.');
-        }
-
-        return $this->caldavBackend->shareReply($href, $status, $calendarUri, $inReplyTo, $summary);
-
-    }
-
 }
diff --git a/3rdparty/Sabre/CalDAV/Version.php b/3rdparty/Sabre/CalDAV/Version.php
index 0ad14fa0869..ace9901c089 100755
--- a/3rdparty/Sabre/CalDAV/Version.php
+++ b/3rdparty/Sabre/CalDAV/Version.php
@@ -14,7 +14,7 @@ class Sabre_CalDAV_Version {
     /**
      * Full version number
      */
-    const VERSION = '1.7.0';
+    const VERSION = '1.6.4';
 
     /**
      * Stability : alpha, beta, stable
diff --git a/3rdparty/Sabre/CalDAV/includes.php b/3rdparty/Sabre/CalDAV/includes.php
index 8b38e398f65..1ecb870a0e1 100755
--- a/3rdparty/Sabre/CalDAV/includes.php
+++ b/3rdparty/Sabre/CalDAV/includes.php
@@ -16,47 +16,28 @@
  */
 
 // Begin includes
-include __DIR__ . '/Backend/BackendInterface.php';
-include __DIR__ . '/Backend/NotificationSupport.php';
-include __DIR__ . '/Backend/SharingSupport.php';
+include __DIR__ . '/Backend/Abstract.php';
+include __DIR__ . '/Backend/PDO.php';
 include __DIR__ . '/CalendarQueryParser.php';
 include __DIR__ . '/CalendarQueryValidator.php';
 include __DIR__ . '/CalendarRootNode.php';
-include __DIR__ . '/Exception/InvalidComponentType.php';
 include __DIR__ . '/ICalendar.php';
 include __DIR__ . '/ICalendarObject.php';
 include __DIR__ . '/ICSExportPlugin.php';
-include __DIR__ . '/IShareableCalendar.php';
-include __DIR__ . '/ISharedCalendar.php';
-include __DIR__ . '/Notifications/ICollection.php';
-include __DIR__ . '/Notifications/INode.php';
-include __DIR__ . '/Notifications/INotificationType.php';
-include __DIR__ . '/Notifications/Node.php';
-include __DIR__ . '/Notifications/Notification/Invite.php';
-include __DIR__ . '/Notifications/Notification/InviteReply.php';
-include __DIR__ . '/Notifications/Notification/SystemStatus.php';
 include __DIR__ . '/Plugin.php';
 include __DIR__ . '/Principal/Collection.php';
 include __DIR__ . '/Principal/ProxyRead.php';
 include __DIR__ . '/Principal/ProxyWrite.php';
 include __DIR__ . '/Principal/User.php';
-include __DIR__ . '/Property/AllowedSharingModes.php';
-include __DIR__ . '/Property/Invite.php';
-include __DIR__ . '/Property/ScheduleCalendarTransp.php';
 include __DIR__ . '/Property/SupportedCalendarComponentSet.php';
 include __DIR__ . '/Property/SupportedCalendarData.php';
 include __DIR__ . '/Property/SupportedCollationSet.php';
 include __DIR__ . '/Schedule/IMip.php';
 include __DIR__ . '/Schedule/IOutbox.php';
 include __DIR__ . '/Schedule/Outbox.php';
-include __DIR__ . '/SharingPlugin.php';
+include __DIR__ . '/Server.php';
 include __DIR__ . '/UserCalendars.php';
 include __DIR__ . '/Version.php';
-include __DIR__ . '/Backend/Abstract.php';
-include __DIR__ . '/Backend/PDO.php';
 include __DIR__ . '/Calendar.php';
 include __DIR__ . '/CalendarObject.php';
-include __DIR__ . '/Notifications/Collection.php';
-include __DIR__ . '/ShareableCalendar.php';
-include __DIR__ . '/SharedCalendar.php';
 // End includes
-- 
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