Replace linkRegex with xurls library (#6261)

* Replace linkRegex with xurls library

Rather than maintaining a complicated regex to match URLs for
autolinking, gitea can use this existing go library that takes care of
the matching with very little code change to gitea itself. After
spending a while trying to find the perfect regex for all cases this library
still works better as it is more flexible than a single regex ever will be.

This will also fix the following issues: #5844 #3095 #3381

This passes all our current tests and I've added new ones mentioned in
those issues as well.

* Use xurls.StrictMatchingScheme instead of xurls.Strict

This is much faster and we only care about https? links to preserve
existing behavior.

5 files changed, 2014 insertions, 0 deletions

diff --git a/vendor/github.com/mvdan/xurls/LICENSE b/vendor/github.com/mvdan/xurls/LICENSE
new file mode 100644
index 0000000000..7d71d51a5e
--- /dev/null
+++ b/vendor/github.com/mvdan/xurls/LICENSE
@@ -0,0 +1,27 @@
+Copyright (c) 2015, Daniel Martí. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of the copyright holder nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/github.com/mvdan/xurls/schemes.go b/vendor/github.com/mvdan/xurls/schemes.go
new file mode 100644
index 0000000000..01b7944ae3
--- /dev/null
+++ b/vendor/github.com/mvdan/xurls/schemes.go
@@ -0,0 +1,299 @@
+// Generated by schemesgen
+
+package xurls
+
+// Schemes is a sorted list of all IANA assigned schemes.
+//
+// Source:
+//   https://www.iana.org/assignments/uri-schemes/uri-schemes-1.csv
+var Schemes = []string{
+	`aaa`,
+	`aaas`,
+	`about`,
+	`acap`,
+	`acct`,
+	`acr`,
+	`adiumxtra`,
+	`afp`,
+	`afs`,
+	`aim`,
+	`appdata`,
+	`apt`,
+	`attachment`,
+	`aw`,
+	`barion`,
+	`beshare`,
+	`bitcoin`,
+	`bitcoincash`,
+	`blob`,
+	`bolo`,
+	`browserext`,
+	`callto`,
+	`cap`,
+	`chrome`,
+	`chrome-extension`,
+	`cid`,
+	`coap`,
+	`coap+tcp`,
+	`coap+ws`,
+	`coaps`,
+	`coaps+tcp`,
+	`coaps+ws`,
+	`com-eventbrite-attendee`,
+	`content`,
+	`conti`,
+	`crid`,
+	`cvs`,
+	`data`,
+	`dav`,
+	`diaspora`,
+	`dict`,
+	`did`,
+	`dis`,
+	`dlna-playcontainer`,
+	`dlna-playsingle`,
+	`dns`,
+	`dntp`,
+	`dtn`,
+	`dvb`,
+	`ed2k`,
+	`elsi`,
+	`example`,
+	`facetime`,
+	`fax`,
+	`feed`,
+	`feedready`,
+	`file`,
+	`filesystem`,
+	`finger`,
+	`fish`,
+	`ftp`,
+	`geo`,
+	`gg`,
+	`git`,
+	`gizmoproject`,
+	`go`,
+	`gopher`,
+	`graph`,
+	`gtalk`,
+	`h323`,
+	`ham`,
+	`hcap`,
+	`hcp`,
+	`http`,
+	`https`,
+	`hxxp`,
+	`hxxps`,
+	`hydrazone`,
+	`iax`,
+	`icap`,
+	`icon`,
+	`im`,
+	`imap`,
+	`info`,
+	`iotdisco`,
+	`ipn`,
+	`ipp`,
+	`ipps`,
+	`irc`,
+	`irc6`,
+	`ircs`,
+	`iris`,
+	`iris.beep`,
+	`iris.lwz`,
+	`iris.xpc`,
+	`iris.xpcs`,
+	`isostore`,
+	`itms`,
+	`jabber`,
+	`jar`,
+	`jms`,
+	`keyparc`,
+	`lastfm`,
+	`ldap`,
+	`ldaps`,
+	`lvlt`,
+	`magnet`,
+	`mailserver`,
+	`mailto`,
+	`maps`,
+	`market`,
+	`message`,
+	`microsoft.windows.camera`,
+	`microsoft.windows.camera.multipicker`,
+	`microsoft.windows.camera.picker`,
+	`mid`,
+	`mms`,
+	`modem`,
+	`mongodb`,
+	`moz`,
+	`ms-access`,
+	`ms-browser-extension`,
+	`ms-drive-to`,
+	`ms-enrollment`,
+	`ms-excel`,
+	`ms-gamebarservices`,
+	`ms-gamingoverlay`,
+	`ms-getoffice`,
+	`ms-help`,
+	`ms-infopath`,
+	`ms-inputapp`,
+	`ms-lockscreencomponent-config`,
+	`ms-media-stream-id`,
+	`ms-mixedrealitycapture`,
+	`ms-officeapp`,
+	`ms-people`,
+	`ms-project`,
+	`ms-powerpoint`,
+	`ms-publisher`,
+	`ms-restoretabcompanion`,
+	`ms-screenclip`,
+	`ms-screensketch`,
+	`ms-search`,
+	`ms-search-repair`,
+	`ms-secondary-screen-controller`,
+	`ms-secondary-screen-setup`,
+	`ms-settings`,
+	`ms-settings-airplanemode`,
+	`ms-settings-bluetooth`,
+	`ms-settings-camera`,
+	`ms-settings-cellular`,
+	`ms-settings-cloudstorage`,
+	`ms-settings-connectabledevices`,
+	`ms-settings-displays-topology`,
+	`ms-settings-emailandaccounts`,
+	`ms-settings-language`,
+	`ms-settings-location`,
+	`ms-settings-lock`,
+	`ms-settings-nfctransactions`,
+	`ms-settings-notifications`,
+	`ms-settings-power`,
+	`ms-settings-privacy`,
+	`ms-settings-proximity`,
+	`ms-settings-screenrotation`,
+	`ms-settings-wifi`,
+	`ms-settings-workplace`,
+	`ms-spd`,
+	`ms-sttoverlay`,
+	`ms-transit-to`,
+	`ms-useractivityset`,
+	`ms-virtualtouchpad`,
+	`ms-visio`,
+	`ms-walk-to`,
+	`ms-whiteboard`,
+	`ms-whiteboard-cmd`,
+	`ms-word`,
+	`msnim`,
+	`msrp`,
+	`msrps`,
+	`mtqp`,
+	`mumble`,
+	`mupdate`,
+	`mvn`,
+	`news`,
+	`nfs`,
+	`ni`,
+	`nih`,
+	`nntp`,
+	`notes`,
+	`ocf`,
+	`oid`,
+	`onenote`,
+	`onenote-cmd`,
+	`opaquelocktoken`,
+	`openpgp4fpr`,
+	`pack`,
+	`palm`,
+	`paparazzi`,
+	`pkcs11`,
+	`platform`,
+	`pop`,
+	`pres`,
+	`prospero`,
+	`proxy`,
+	`pwid`,
+	`psyc`,
+	`qb`,
+	`query`,
+	`redis`,
+	`rediss`,
+	`reload`,
+	`res`,
+	`resource`,
+	`rmi`,
+	`rsync`,
+	`rtmfp`,
+	`rtmp`,
+	`rtsp`,
+	`rtsps`,
+	`rtspu`,
+	`secondlife`,
+	`service`,
+	`session`,
+	`sftp`,
+	`sgn`,
+	`shttp`,
+	`sieve`,
+	`simpleledger`,
+	`sip`,
+	`sips`,
+	`skype`,
+	`smb`,
+	`sms`,
+	`smtp`,
+	`snews`,
+	`snmp`,
+	`soap.beep`,
+	`soap.beeps`,
+	`soldat`,
+	`spiffe`,
+	`spotify`,
+	`ssh`,
+	`steam`,
+	`stun`,
+	`stuns`,
+	`submit`,
+	`svn`,
+	`tag`,
+	`teamspeak`,
+	`tel`,
+	`teliaeid`,
+	`telnet`,
+	`tftp`,
+	`things`,
+	`thismessage`,
+	`tip`,
+	`tn3270`,
+	`tool`,
+	`turn`,
+	`turns`,
+	`tv`,
+	`udp`,
+	`unreal`,
+	`urn`,
+	`ut2004`,
+	`v-event`,
+	`vemmi`,
+	`ventrilo`,
+	`videotex`,
+	`vnc`,
+	`view-source`,
+	`wais`,
+	`webcal`,
+	`wpid`,
+	`ws`,
+	`wss`,
+	`wtai`,
+	`wyciwyg`,
+	`xcon`,
+	`xcon-userid`,
+	`xfire`,
+	`xmlrpc.beep`,
+	`xmlrpc.beeps`,
+	`xmpp`,
+	`xri`,
+	`ymsgr`,
+	`z39.50`,
+	`z39.50r`,
+	`z39.50s`,
+}
diff --git a/vendor/github.com/mvdan/xurls/tlds.go b/vendor/github.com/mvdan/xurls/tlds.go
new file mode 100644
index 0000000000..084ab84d46
--- /dev/null
+++ b/vendor/github.com/mvdan/xurls/tlds.go
@@ -0,0 +1,1557 @@
+// Generated by tldsgen
+
+package xurls
+
+// TLDs is a sorted list of all public top-level domains.
+//
+// Sources:
+//  * https://data.iana.org/TLD/tlds-alpha-by-domain.txt
+//  * https://publicsuffix.org/list/effective_tld_names.dat
+var TLDs = []string{
+	`aaa`,
+	`aarp`,
+	`abarth`,
+	`abb`,
+	`abbott`,
+	`abbvie`,
+	`abc`,
+	`able`,
+	`abogado`,
+	`abudhabi`,
+	`ac`,
+	`academy`,
+	`accenture`,
+	`accountant`,
+	`accountants`,
+	`aco`,
+	`active`,
+	`actor`,
+	`ad`,
+	`adac`,
+	`ads`,
+	`adult`,
+	`ae`,
+	`aeg`,
+	`aero`,
+	`aetna`,
+	`af`,
+	`afamilycompany`,
+	`afl`,
+	`africa`,
+	`ag`,
+	`agakhan`,
+	`agency`,
+	`ai`,
+	`aig`,
+	`aigo`,
+	`airbus`,
+	`airforce`,
+	`airtel`,
+	`akdn`,
+	`al`,
+	`alfaromeo`,
+	`alibaba`,
+	`alipay`,
+	`allfinanz`,
+	`allstate`,
+	`ally`,
+	`alsace`,
+	`alstom`,
+	`am`,
+	`americanexpress`,
+	`americanfamily`,
+	`amex`,
+	`amfam`,
+	`amica`,
+	`amsterdam`,
+	`analytics`,
+	`android`,
+	`anquan`,
+	`anz`,
+	`ao`,
+	`aol`,
+	`apartments`,
+	`app`,
+	`apple`,
+	`aq`,
+	`aquarelle`,
+	`ar`,
+	`arab`,
+	`aramco`,
+	`archi`,
+	`army`,
+	`arpa`,
+	`art`,
+	`arte`,
+	`as`,
+	`asda`,
+	`asia`,
+	`associates`,
+	`at`,
+	`athleta`,
+	`attorney`,
+	`au`,
+	`auction`,
+	`audi`,
+	`audible`,
+	`audio`,
+	`auspost`,
+	`author`,
+	`auto`,
+	`autos`,
+	`avianca`,
+	`aw`,
+	`aws`,
+	`ax`,
+	`axa`,
+	`az`,
+	`azure`,
+	`ba`,
+	`baby`,
+	`baidu`,
+	`banamex`,
+	`bananarepublic`,
+	`band`,
+	`bank`,
+	`bar`,
+	`barcelona`,
+	`barclaycard`,
+	`barclays`,
+	`barefoot`,
+	`bargains`,
+	`baseball`,
+	`basketball`,
+	`bauhaus`,
+	`bayern`,
+	`bb`,
+	`bbc`,
+	`bbt`,
+	`bbva`,
+	`bcg`,
+	`bcn`,
+	`bd`,
+	`be`,
+	`beats`,
+	`beauty`,
+	`beer`,
+	`bentley`,
+	`berlin`,
+	`best`,
+	`bestbuy`,
+	`bet`,
+	`bf`,
+	`bg`,
+	`bh`,
+	`bharti`,
+	`bi`,
+	`bible`,
+	`bid`,
+	`bike`,
+	`bing`,
+	`bingo`,
+	`bio`,
+	`biz`,
+	`bj`,
+	`black`,
+	`blackfriday`,
+	`blanco`,
+	`blockbuster`,
+	`blog`,
+	`bloomberg`,
+	`blue`,
+	`bm`,
+	`bms`,
+	`bmw`,
+	`bn`,
+	`bnl`,
+	`bnpparibas`,
+	`bo`,
+	`boats`,
+	`boehringer`,
+	`bofa`,
+	`bom`,
+	`bond`,
+	`boo`,
+	`book`,
+	`booking`,
+	`bosch`,
+	`bostik`,
+	`boston`,
+	`bot`,
+	`boutique`,
+	`box`,
+	`br`,
+	`bradesco`,
+	`bridgestone`,
+	`broadway`,
+	`broker`,
+	`brother`,
+	`brussels`,
+	`bs`,
+	`bt`,
+	`budapest`,
+	`bugatti`,
+	`build`,
+	`builders`,
+	`business`,
+	`buy`,
+	`buzz`,
+	`bv`,
+	`bw`,
+	`by`,
+	`bz`,
+	`bzh`,
+	`ca`,
+	`cab`,
+	`cafe`,
+	`cal`,
+	`call`,
+	`calvinklein`,
+	`cam`,
+	`camera`,
+	`camp`,
+	`cancerresearch`,
+	`canon`,
+	`capetown`,
+	`capital`,
+	`capitalone`,
+	`car`,
+	`caravan`,
+	`cards`,
+	`care`,
+	`career`,
+	`careers`,
+	`cars`,
+	`cartier`,
+	`casa`,
+	`case`,
+	`caseih`,
+	`cash`,
+	`casino`,
+	`cat`,
+	`catering`,
+	`catholic`,
+	`cba`,
+	`cbn`,
+	`cbre`,
+	`cbs`,
+	`cc`,
+	`cd`,
+	`ceb`,
+	`center`,
+	`ceo`,
+	`cern`,
+	`cf`,
+	`cfa`,
+	`cfd`,
+	`cg`,
+	`ch`,
+	`chanel`,
+	`channel`,
+	`charity`,
+	`chase`,
+	`chat`,
+	`cheap`,
+	`chintai`,
+	`christmas`,
+	`chrome`,
+	`chrysler`,
+	`church`,
+	`ci`,
+	`cipriani`,
+	`circle`,
+	`cisco`,
+	`citadel`,
+	`citi`,
+	`citic`,
+	`city`,
+	`cityeats`,
+	`ck`,
+	`cl`,
+	`claims`,
+	`cleaning`,
+	`click`,
+	`clinic`,
+	`clinique`,
+	`clothing`,
+	`cloud`,
+	`club`,
+	`clubmed`,
+	`cm`,
+	`cn`,
+	`co`,
+	`coach`,
+	`codes`,
+	`coffee`,
+	`college`,
+	`cologne`,
+	`com`,
+	`comcast`,
+	`commbank`,
+	`community`,
+	`company`,
+	`compare`,
+	`computer`,
+	`comsec`,
+	`condos`,
+	`construction`,
+	`consulting`,
+	`contact`,
+	`contractors`,
+	`cooking`,
+	`cookingchannel`,
+	`cool`,
+	`coop`,
+	`corsica`,
+	`country`,
+	`coupon`,
+	`coupons`,
+	`courses`,
+	`cr`,
+	`credit`,
+	`creditcard`,
+	`creditunion`,
+	`cricket`,
+	`crown`,
+	`crs`,
+	`cruise`,
+	`cruises`,
+	`csc`,
+	`cu`,
+	`cuisinella`,
+	`cv`,
+	`cw`,
+	`cx`,
+	`cy`,
+	`cymru`,
+	`cyou`,
+	`cz`,
+	`dabur`,
+	`dad`,
+	`dance`,
+	`data`,
+	`date`,
+	`dating`,
+	`datsun`,
+	`day`,
+	`dclk`,
+	`dds`,
+	`de`,
+	`deal`,
+	`dealer`,
+	`deals`,
+	`degree`,
+	`delivery`,
+	`dell`,
+	`deloitte`,
+	`delta`,
+	`democrat`,
+	`dental`,
+	`dentist`,
+	`desi`,
+	`design`,
+	`dev`,
+	`dhl`,
+	`diamonds`,
+	`diet`,
+	`digital`,
+	`direct`,
+	`directory`,
+	`discount`,
+	`discover`,
+	`dish`,
+	`diy`,
+	`dj`,
+	`dk`,
+	`dm`,
+	`dnp`,
+	`do`,
+	`docs`,
+	`doctor`,
+	`dodge`,
+	`dog`,
+	`doha`,
+	`domains`,
+	`dot`,
+	`download`,
+	`drive`,
+	`dtv`,
+	`dubai`,
+	`duck`,
+	`dunlop`,
+	`duns`,
+	`dupont`,
+	`durban`,
+	`dvag`,
+	`dvr`,
+	`dz`,
+	`earth`,
+	`eat`,
+	`ec`,
+	`eco`,
+	`edeka`,
+	`edu`,
+	`education`,
+	`ee`,
+	`eg`,
+	`email`,
+	`emerck`,
+	`energy`,
+	`engineer`,
+	`engineering`,
+	`enterprises`,
+	`epost`,
+	`epson`,
+	`equipment`,
+	`er`,
+	`ericsson`,
+	`erni`,
+	`es`,
+	`esq`,
+	`estate`,
+	`esurance`,
+	`et`,
+	`etisalat`,
+	`eu`,
+	`eurovision`,
+	`eus`,
+	`events`,
+	`everbank`,
+	`exchange`,
+	`expert`,
+	`exposed`,
+	`express`,
+	`extraspace`,
+	`fage`,
+	`fail`,
+	`fairwinds`,
+	`faith`,
+	`family`,
+	`fan`,
+	`fans`,
+	`farm`,
+	`farmers`,
+	`fashion`,
+	`fast`,
+	`fedex`,
+	`feedback`,
+	`ferrari`,
+	`ferrero`,
+	`fi`,
+	`fiat`,
+	`fidelity`,
+	`fido`,
+	`film`,
+	`final`,
+	`finance`,
+	`financial`,
+	`fire`,
+	`firestone`,
+	`firmdale`,
+	`fish`,
+	`fishing`,
+	`fit`,
+	`fitness`,
+	`fj`,
+	`fk`,
+	`flickr`,
+	`flights`,
+	`flir`,
+	`florist`,
+	`flowers`,
+	`fly`,
+	`fm`,
+	`fo`,
+	`foo`,
+	`food`,
+	`foodnetwork`,
+	`football`,
+	`ford`,
+	`forex`,
+	`forsale`,
+	`forum`,
+	`foundation`,
+	`fox`,
+	`fr`,
+	`free`,
+	`fresenius`,
+	`frl`,
+	`frogans`,
+	`frontdoor`,
+	`frontier`,
+	`ftr`,
+	`fujitsu`,
+	`fujixerox`,
+	`fun`,
+	`fund`,
+	`furniture`,
+	`futbol`,
+	`fyi`,
+	`ga`,
+	`gal`,
+	`gallery`,
+	`gallo`,
+	`gallup`,
+	`game`,
+	`games`,
+	`gap`,
+	`garden`,
+	`gb`,
+	`gbiz`,
+	`gd`,
+	`gdn`,
+	`ge`,
+	`gea`,
+	`gent`,
+	`genting`,
+	`george`,
+	`gf`,
+	`gg`,
+	`ggee`,
+	`gh`,
+	`gi`,
+	`gift`,
+	`gifts`,
+	`gives`,
+	`giving`,
+	`gl`,
+	`glade`,
+	`glass`,
+	`gle`,
+	`global`,
+	`globo`,
+	`gm`,
+	`gmail`,
+	`gmbh`,
+	`gmo`,
+	`gmx`,
+	`gn`,
+	`godaddy`,
+	`gold`,
+	`goldpoint`,
+	`golf`,
+	`goo`,
+	`goodyear`,
+	`goog`,
+	`google`,
+	`gop`,
+	`got`,
+	`gov`,
+	`gp`,
+	`gq`,
+	`gr`,
+	`grainger`,
+	`graphics`,
+	`gratis`,
+	`green`,
+	`gripe`,
+	`grocery`,
+	`group`,
+	`gs`,
+	`gt`,
+	`gu`,
+	`guardian`,
+	`gucci`,
+	`guge`,
+	`guide`,
+	`guitars`,
+	`guru`,
+	`gw`,
+	`gy`,
+	`hair`,
+	`hamburg`,
+	`hangout`,
+	`haus`,
+	`hbo`,
+	`hdfc`,
+	`hdfcbank`,
+	`health`,
+	`healthcare`,
+	`help`,
+	`helsinki`,
+	`here`,
+	`hermes`,
+	`hgtv`,
+	`hiphop`,
+	`hisamitsu`,
+	`hitachi`,
+	`hiv`,
+	`hk`,
+	`hkt`,
+	`hm`,
+	`hn`,
+	`hockey`,
+	`holdings`,
+	`holiday`,
+	`homedepot`,
+	`homegoods`,
+	`homes`,
+	`homesense`,
+	`honda`,
+	`honeywell`,
+	`horse`,
+	`hospital`,
+	`host`,
+	`hosting`,
+	`hot`,
+	`hoteles`,
+	`hotels`,
+	`hotmail`,
+	`house`,
+	`how`,
+	`hr`,
+	`hsbc`,
+	`ht`,
+	`hu`,
+	`hughes`,
+	`hyatt`,
+	`hyundai`,
+	`ibm`,
+	`icbc`,
+	`ice`,
+	`icu`,
+	`id`,
+	`ie`,
+	`ieee`,
+	`ifm`,
+	`ikano`,
+	`il`,
+	`im`,
+	`imamat`,
+	`imdb`,
+	`immo`,
+	`immobilien`,
+	`in`,
+	`inc`,
+	`industries`,
+	`infiniti`,
+	`info`,
+	`ing`,
+	`ink`,
+	`institute`,
+	`insurance`,
+	`insure`,
+	`int`,
+	`intel`,
+	`international`,
+	`intuit`,
+	`investments`,
+	`io`,
+	`ipiranga`,
+	`iq`,
+	`ir`,
+	`irish`,
+	`is`,
+	`iselect`,
+	`ismaili`,
+	`ist`,
+	`istanbul`,
+	`it`,
+	`itau`,
+	`itv`,
+	`iveco`,
+	`jaguar`,
+	`java`,
+	`jcb`,
+	`jcp`,
+	`je`,
+	`jeep`,
+	`jetzt`,
+	`jewelry`,
+	`jio`,
+	`jll`,
+	`jm`,
+	`jmp`,
+	`jnj`,
+	`jo`,
+	`jobs`,
+	`joburg`,
+	`jot`,
+	`joy`,
+	`jp`,
+	`jpmorgan`,
+	`jprs`,
+	`juegos`,
+	`juniper`,
+	`kaufen`,
+	`kddi`,
+	`ke`,
+	`kerryhotels`,
+	`kerrylogistics`,
+	`kerryproperties`,
+	`kfh`,
+	`kg`,
+	`kh`,
+	`ki`,
+	`kia`,
+	`kim`,
+	`kinder`,
+	`kindle`,
+	`kitchen`,
+	`kiwi`,
+	`km`,
+	`kn`,
+	`koeln`,
+	`komatsu`,
+	`kosher`,
+	`kp`,
+	`kpmg`,
+	`kpn`,
+	`kr`,
+	`krd`,
+	`kred`,
+	`kuokgroup`,
+	`kw`,
+	`ky`,
+	`kyoto`,
+	`kz`,
+	`la`,
+	`lacaixa`,
+	`ladbrokes`,
+	`lamborghini`,
+	`lamer`,
+	`lancaster`,
+	`lancia`,
+	`lancome`,
+	`land`,
+	`landrover`,
+	`lanxess`,
+	`lasalle`,
+	`lat`,
+	`latino`,
+	`latrobe`,
+	`law`,
+	`lawyer`,
+	`lb`,
+	`lc`,
+	`lds`,
+	`lease`,
+	`leclerc`,
+	`lefrak`,
+	`legal`,
+	`lego`,
+	`lexus`,
+	`lgbt`,
+	`li`,
+	`liaison`,
+	`lidl`,
+	`life`,
+	`lifeinsurance`,
+	`lifestyle`,
+	`lighting`,
+	`like`,
+	`lilly`,
+	`limited`,
+	`limo`,
+	`lincoln`,
+	`linde`,
+	`link`,
+	`lipsy`,
+	`live`,
+	`living`,
+	`lixil`,
+	`lk`,
+	`llc`,
+	`loan`,
+	`loans`,
+	`locker`,
+	`locus`,
+	`loft`,
+	`lol`,
+	`london`,
+	`lotte`,
+	`lotto`,
+	`love`,
+	`lpl`,
+	`lplfinancial`,
+	`lr`,
+	`ls`,
+	`lt`,
+	`ltd`,
+	`ltda`,
+	`lu`,
+	`lundbeck`,
+	`lupin`,
+	`luxe`,
+	`luxury`,
+	`lv`,
+	`ly`,
+	`ma`,
+	`macys`,
+	`madrid`,
+	`maif`,
+	`maison`,
+	`makeup`,
+	`man`,
+	`management`,
+	`mango`,
+	`map`,
+	`market`,
+	`marketing`,
+	`markets`,
+	`marriott`,
+	`marshalls`,
+	`maserati`,
+	`mattel`,
+	`mba`,
+	`mc`,
+	`mckinsey`,
+	`md`,
+	`me`,
+	`med`,
+	`media`,
+	`meet`,
+	`melbourne`,
+	`meme`,
+	`memorial`,
+	`men`,
+	`menu`,
+	`merckmsd`,
+	`metlife`,
+	`mg`,
+	`mh`,
+	`miami`,
+	`microsoft`,
+	`mil`,
+	`mini`,
+	`mint`,
+	`mit`,
+	`mitsubishi`,
+	`mk`,
+	`ml`,
+	`mlb`,
+	`mls`,
+	`mm`,
+	`mma`,
+	`mn`,
+	`mo`,
+	`mobi`,
+	`mobile`,
+	`mobily`,
+	`moda`,
+	`moe`,
+	`moi`,
+	`mom`,
+	`monash`,
+	`money`,
+	`monster`,
+	`mopar`,
+	`mormon`,
+	`mortgage`,
+	`moscow`,
+	`moto`,
+	`motorcycles`,
+	`mov`,
+	`movie`,
+	`movistar`,
+	`mp`,
+	`mq`,
+	`mr`,
+	`ms`,
+	`msd`,
+	`mt`,
+	`mtn`,
+	`mtr`,
+	`mu`,
+	`museum`,
+	`mutual`,
+	`mv`,
+	`mw`,
+	`mx`,
+	`my`,
+	`mz`,
+	`na`,
+	`nab`,
+	`nadex`,
+	`nagoya`,
+	`name`,
+	`nationwide`,
+	`natura`,
+	`navy`,
+	`nba`,
+	`nc`,
+	`ne`,
+	`nec`,
+	`net`,
+	`netbank`,
+	`netflix`,
+	`network`,
+	`neustar`,
+	`new`,
+	`newholland`,
+	`news`,
+	`next`,
+	`nextdirect`,
+	`nexus`,
+	`nf`,
+	`nfl`,
+	`ng`,
+	`ngo`,
+	`nhk`,
+	`ni`,
+	`nico`,
+	`nike`,
+	`nikon`,
+	`ninja`,
+	`nissan`,
+	`nissay`,
+	`nl`,
+	`no`,
+	`nokia`,
+	`northwesternmutual`,
+	`norton`,
+	`now`,
+	`nowruz`,
+	`nowtv`,
+	`np`,
+	`nr`,
+	`nra`,
+	`nrw`,
+	`ntt`,
+	`nu`,
+	`nyc`,
+	`nz`,
+	`obi`,
+	`observer`,
+	`off`,
+	`office`,
+	`okinawa`,
+	`olayan`,
+	`olayangroup`,
+	`oldnavy`,
+	`ollo`,
+	`om`,
+	`omega`,
+	`one`,
+	`ong`,
+	`onion`,
+	`onl`,
+	`online`,
+	`onyourside`,
+	`ooo`,
+	`open`,
+	`oracle`,
+	`orange`,
+	`org`,
+	`organic`,
+	`origins`,
+	`osaka`,
+	`otsuka`,
+	`ott`,
+	`ovh`,
+	`pa`,
+	`page`,
+	`panasonic`,
+	`paris`,
+	`pars`,
+	`partners`,
+	`parts`,
+	`party`,
+	`passagens`,
+	`pay`,
+	`pccw`,
+	`pe`,
+	`pet`,
+	`pf`,
+	`pfizer`,
+	`pg`,
+	`ph`,
+	`pharmacy`,
+	`phd`,
+	`philips`,
+	`phone`,
+	`photo`,
+	`photography`,
+	`photos`,
+	`physio`,
+	`piaget`,
+	`pics`,
+	`pictet`,
+	`pictures`,
+	`pid`,
+	`pin`,
+	`ping`,
+	`pink`,
+	`pioneer`,
+	`pizza`,
+	`pk`,
+	`pl`,
+	`place`,
+	`play`,
+	`playstation`,
+	`plumbing`,
+	`plus`,
+	`pm`,
+	`pn`,
+	`pnc`,
+	`pohl`,
+	`poker`,
+	`politie`,
+	`porn`,
+	`post`,
+	`pr`,
+	`pramerica`,
+	`praxi`,
+	`press`,
+	`prime`,
+	`pro`,
+	`prod`,
+	`productions`,
+	`prof`,
+	`progressive`,
+	`promo`,
+	`properties`,
+	`property`,
+	`protection`,
+	`pru`,
+	`prudential`,
+	`ps`,
+	`pt`,
+	`pub`,
+	`pw`,
+	`pwc`,
+	`py`,
+	`qa`,
+	`qpon`,
+	`quebec`,
+	`quest`,
+	`qvc`,
+	`racing`,
+	`radio`,
+	`raid`,
+	`re`,
+	`read`,
+	`realestate`,
+	`realtor`,
+	`realty`,
+	`recipes`,
+	`red`,
+	`redstone`,
+	`redumbrella`,
+	`rehab`,
+	`reise`,
+	`reisen`,
+	`reit`,
+	`reliance`,
+	`ren`,
+	`rent`,
+	`rentals`,
+	`repair`,
+	`report`,
+	`republican`,
+	`rest`,
+	`restaurant`,
+	`review`,
+	`reviews`,
+	`rexroth`,
+	`rich`,
+	`richardli`,
+	`ricoh`,
+	`rightathome`,
+	`ril`,
+	`rio`,
+	`rip`,
+	`rmit`,
+	`ro`,
+	`rocher`,
+	`rocks`,
+	`rodeo`,
+	`rogers`,
+	`room`,
+	`rs`,
+	`rsvp`,
+	`ru`,
+	`rugby`,
+	`ruhr`,
+	`run`,
+	`rw`,
+	`rwe`,
+	`ryukyu`,
+	`sa`,
+	`saarland`,
+	`safe`,
+	`safety`,
+	`sakura`,
+	`sale`,
+	`salon`,
+	`samsclub`,
+	`samsung`,
+	`sandvik`,
+	`sandvikcoromant`,
+	`sanofi`,
+	`sap`,
+	`sarl`,
+	`sas`,
+	`save`,
+	`saxo`,
+	`sb`,
+	`sbi`,
+	`sbs`,
+	`sc`,
+	`sca`,
+	`scb`,
+	`schaeffler`,
+	`schmidt`,
+	`scholarships`,
+	`school`,
+	`schule`,
+	`schwarz`,
+	`science`,
+	`scjohnson`,
+	`scor`,
+	`scot`,
+	`sd`,
+	`se`,
+	`search`,
+	`seat`,
+	`secure`,
+	`security`,
+	`seek`,
+	`select`,
+	`sener`,
+	`services`,
+	`ses`,
+	`seven`,
+	`sew`,
+	`sex`,
+	`sexy`,
+	`sfr`,
+	`sg`,
+	`sh`,
+	`shangrila`,
+	`sharp`,
+	`shaw`,
+	`shell`,
+	`shia`,
+	`shiksha`,
+	`shoes`,
+	`shop`,
+	`shopping`,
+	`shouji`,
+	`show`,
+	`showtime`,
+	`shriram`,
+	`si`,
+	`silk`,
+	`sina`,
+	`singles`,
+	`site`,
+	`sj`,
+	`sk`,
+	`ski`,
+	`skin`,
+	`sky`,
+	`skype`,
+	`sl`,
+	`sling`,
+	`sm`,
+	`smart`,
+	`smile`,
+	`sn`,
+	`sncf`,
+	`so`,
+	`soccer`,
+	`social`,
+	`softbank`,
+	`software`,
+	`sohu`,
+	`solar`,
+	`solutions`,
+	`song`,
+	`sony`,
+	`soy`,
+	`space`,
+	`spiegel`,
+	`sport`,
+	`spot`,
+	`spreadbetting`,
+	`sr`,
+	`srl`,
+	`srt`,
+	`st`,
+	`stada`,
+	`staples`,
+	`star`,
+	`starhub`,
+	`statebank`,
+	`statefarm`,
+	`statoil`,
+	`stc`,
+	`stcgroup`,
+	`stockholm`,
+	`storage`,
+	`store`,
+	`stream`,
+	`studio`,
+	`study`,
+	`style`,
+	`su`,
+	`sucks`,
+	`supplies`,
+	`supply`,
+	`support`,
+	`surf`,
+	`surgery`,
+	`suzuki`,
+	`sv`,
+	`swatch`,
+	`swiftcover`,
+	`swiss`,
+	`sx`,
+	`sy`,
+	`sydney`,
+	`symantec`,
+	`systems`,
+	`sz`,
+	`tab`,
+	`taipei`,
+	`talk`,
+	`taobao`,
+	`target`,
+	`tatamotors`,
+	`tatar`,
+	`tattoo`,
+	`tax`,
+	`taxi`,
+	`tc`,
+	`tci`,
+	`td`,
+	`tdk`,
+	`team`,
+	`tech`,
+	`technology`,
+	`tel`,
+	`telefonica`,
+	`temasek`,
+	`tennis`,
+	`teva`,
+	`tf`,
+	`tg`,
+	`th`,
+	`thd`,
+	`theater`,
+	`theatre`,
+	`tiaa`,
+	`tickets`,
+	`tienda`,
+	`tiffany`,
+	`tips`,
+	`tires`,
+	`tirol`,
+	`tj`,
+	`tjmaxx`,
+	`tjx`,
+	`tk`,
+	`tkmaxx`,
+	`tl`,
+	`tm`,
+	`tmall`,
+	`tn`,
+	`to`,
+	`today`,
+	`tokyo`,
+	`tools`,
+	`top`,
+	`toray`,
+	`toshiba`,
+	`total`,
+	`tours`,
+	`town`,
+	`toyota`,
+	`toys`,
+	`tr`,
+	`trade`,
+	`trading`,
+	`training`,
+	`travel`,
+	`travelchannel`,
+	`travelers`,
+	`travelersinsurance`,
+	`trust`,
+	`trv`,
+	`tt`,
+	`tube`,
+	`tui`,
+	`tunes`,
+	`tushu`,
+	`tv`,
+	`tvs`,
+	`tw`,
+	`tz`,
+	`ua`,
+	`ubank`,
+	`ubs`,
+	`uconnect`,
+	`ug`,
+	`uk`,
+	`unicom`,
+	`university`,
+	`uno`,
+	`uol`,
+	`ups`,
+	`us`,
+	`uy`,
+	`uz`,
+	`va`,
+	`vacations`,
+	`vana`,
+	`vanguard`,
+	`vc`,
+	`ve`,
+	`vegas`,
+	`ventures`,
+	`verisign`,
+	`vermögensberater`,
+	`vermögensberatung`,
+	`versicherung`,
+	`vet`,
+	`vg`,
+	`vi`,
+	`viajes`,
+	`video`,
+	`vig`,
+	`viking`,
+	`villas`,
+	`vin`,
+	`vip`,
+	`virgin`,
+	`visa`,
+	`vision`,
+	`vistaprint`,
+	`viva`,
+	`vivo`,
+	`vlaanderen`,
+	`vn`,
+	`vodka`,
+	`volkswagen`,
+	`volvo`,
+	`vote`,
+	`voting`,
+	`voto`,
+	`voyage`,
+	`vu`,
+	`vuelos`,
+	`wales`,
+	`walmart`,
+	`walter`,
+	`wang`,
+	`wanggou`,
+	`warman`,
+	`watch`,
+	`watches`,
+	`weather`,
+	`weatherchannel`,
+	`webcam`,
+	`weber`,
+	`website`,
+	`wed`,
+	`wedding`,
+	`weibo`,
+	`weir`,
+	`wf`,
+	`whoswho`,
+	`wien`,
+	`wiki`,
+	`williamhill`,
+	`win`,
+	`windows`,
+	`wine`,
+	`winners`,
+	`wme`,
+	`wolterskluwer`,
+	`woodside`,
+	`work`,
+	`works`,
+	`world`,
+	`wow`,
+	`ws`,
+	`wtc`,
+	`wtf`,
+	`xbox`,
+	`xerox`,
+	`xfinity`,
+	`xihuan`,
+	`xin`,
+	`xxx`,
+	`xyz`,
+	`yachts`,
+	`yahoo`,
+	`yamaxun`,
+	`yandex`,
+	`ye`,
+	`yodobashi`,
+	`yoga`,
+	`yokohama`,
+	`you`,
+	`youtube`,
+	`yt`,
+	`yun`,
+	`za`,
+	`zappos`,
+	`zara`,
+	`zero`,
+	`zip`,
+	`zippo`,
+	`zm`,
+	`zone`,
+	`zuerich`,
+	`zw`,
+	`ελ`,
+	`бг`,
+	`бел`,
+	`дети`,
+	`ею`,
+	`католик`,
+	`ком`,
+	`мкд`,
+	`мон`,
+	`москва`,
+	`онлайн`,
+	`орг`,
+	`рус`,
+	`рф`,
+	`сайт`,
+	`срб`,
+	`укр`,
+	`қаз`,
+	`հայ`,
+	`קום`,
+	`ابوظبي`,
+	`اتصالات`,
+	`ارامكو`,
+	`الاردن`,
+	`الجزائر`,
+	`السعودية`,
+	`السعوديه`,
+	`السعودیة`,
+	`السعودیۃ`,
+	`العليان`,
+	`المغرب`,
+	`اليمن`,
+	`امارات`,
+	`ايران`,
+	`ایران`,
+	`بارت`,
+	`بازار`,
+	`بيتك`,
+	`بھارت`,
+	`تونس`,
+	`سودان`,
+	`سوريا`,
+	`سورية`,
+	`شبكة`,
+	`عراق`,
+	`عرب`,
+	`عمان`,
+	`فلسطين`,
+	`قطر`,
+	`كاثوليك`,
+	`كوم`,
+	`مصر`,
+	`مليسيا`,
+	`موبايلي`,
+	`موقع`,
+	`همراه`,
+	`پاكستان`,
+	`پاکستان`,
+	`ڀارت`,
+	`कॉम`,
+	`नेट`,
+	`भारत`,
+	`भारतम्`,
+	`भारोत`,
+	`संगठन`,
+	`বাংলা`,
+	`ভারত`,
+	`ভাৰত`,
+	`ਭਾਰਤ`,
+	`ભારત`,
+	`ଭାରତ`,
+	`இந்தியா`,
+	`இலங்கை`,
+	`சிங்கப்பூர்`,
+	`భారత్`,
+	`ಭಾರತ`,
+	`ഭാരതം`,
+	`ලංකා`,
+	`คอม`,
+	`ไทย`,
+	`გე`,
+	`みんな`,
+	`クラウド`,
+	`グーグル`,
+	`コム`,
+	`ストア`,
+	`セール`,
+	`ファッション`,
+	`ポイント`,
+	`世界`,
+	`中信`,
+	`中国`,
+	`中國`,
+	`中文网`,
+	`企业`,
+	`佛山`,
+	`信息`,
+	`健康`,
+	`八卦`,
+	`公司`,
+	`公益`,
+	`台湾`,
+	`台灣`,
+	`商城`,
+	`商店`,
+	`商标`,
+	`嘉里`,
+	`嘉里大酒店`,
+	`在线`,
+	`大众汽车`,
+	`大拿`,
+	`天主教`,
+	`娱乐`,
+	`家電`,
+	`工行`,
+	`广东`,
+	`微博`,
+	`慈善`,
+	`我爱你`,
+	`手机`,
+	`手表`,
+	`招聘`,
+	`政务`,
+	`政府`,
+	`新加坡`,
+	`新闻`,
+	`时尚`,
+	`書籍`,
+	`机构`,
+	`淡马锡`,
+	`游戏`,
+	`澳門`,
+	`澳门`,
+	`点看`,
+	`珠宝`,
+	`移动`,
+	`组织机构`,
+	`网址`,
+	`网店`,
+	`网站`,
+	`网络`,
+	`联通`,
+	`臺灣`,
+	`诺基亚`,
+	`谷歌`,
+	`购物`,
+	`通販`,
+	`集团`,
+	`電訊盈科`,
+	`飞利浦`,
+	`食品`,
+	`餐厅`,
+	`香格里拉`,
+	`香港`,
+	`닷넷`,
+	`닷컴`,
+	`삼성`,
+	`한국`,
+}
diff --git a/vendor/github.com/mvdan/xurls/tlds_pseudo.go b/vendor/github.com/mvdan/xurls/tlds_pseudo.go
new file mode 100644
index 0000000000..94c67d15b0
--- /dev/null
+++ b/vendor/github.com/mvdan/xurls/tlds_pseudo.go
@@ -0,0 +1,24 @@
+// Copyright (c) 2015, Daniel Martí <mvdan@mvdan.cc>
+// See LICENSE for licensing information
+
+package xurls
+
+// PseudoTLDs is a sorted list of some widely used unofficial TLDs.
+//
+// Sources:
+//  * https://en.wikipedia.org/wiki/Pseudo-top-level_domain
+//  * https://en.wikipedia.org/wiki/Category:Pseudo-top-level_domains
+//  * https://tools.ietf.org/html/draft-grothoff-iesg-special-use-p2p-names-00
+//  * https://www.iana.org/assignments/special-use-domain-names/special-use-domain-names.xhtml
+var PseudoTLDs = []string{
+	`bit`,       // Namecoin
+	`example`,   // Example domain
+	`exit`,      // Tor exit node
+	`gnu`,       // GNS by public key
+	`i2p`,       // I2P network
+	`invalid`,   // Invalid domain
+	`local`,     // Local network
+	`localhost`, // Local network
+	`test`,      // Test domain
+	`zkey`,      // GNS domain name
+}
diff --git a/vendor/github.com/mvdan/xurls/xurls.go b/vendor/github.com/mvdan/xurls/xurls.go
new file mode 100644
index 0000000000..d6279ae60b
--- /dev/null
+++ b/vendor/github.com/mvdan/xurls/xurls.go
@@ -0,0 +1,107 @@
+// Copyright (c) 2015, Daniel Martí <mvdan@mvdan.cc>
+// See LICENSE for licensing information
+
+// Package xurls extracts urls from plain text using regular expressions.
+package xurls
+
+import (
+	"bytes"
+	"regexp"
+)
+
+//go:generate go run generate/tldsgen/main.go
+//go:generate go run generate/schemesgen/main.go
+
+const (
+	letter    = `\p{L}`
+	mark      = `\p{M}`
+	number    = `\p{N}`
+	iriChar   = letter + mark + number
+	currency  = `\p{Sc}`
+	otherSymb = `\p{So}`
+	endChar   = iriChar + `/\-+_&~*%=#` + currency + otherSymb
+	otherPunc = `\p{Po}`
+	midChar   = endChar + `|` + otherPunc
+	wellParen = `\([` + midChar + `]*(\([` + midChar + `]*\)[` + midChar + `]*)*\)`
+	wellBrack = `\[[` + midChar + `]*(\[[` + midChar + `]*\][` + midChar + `]*)*\]`
+	wellBrace = `\{[` + midChar + `]*(\{[` + midChar + `]*\}[` + midChar + `]*)*\}`
+	wellAll   = wellParen + `|` + wellBrack + `|` + wellBrace
+	pathCont  = `([` + midChar + `]*(` + wellAll + `|[` + endChar + `])+)+`
+
+	iri      = `[` + iriChar + `]([` + iriChar + `\-]*[` + iriChar + `])?`
+	domain   = `(` + iri + `\.)+`
+	octet    = `(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]|[0-9])`
+	ipv4Addr = `\b` + octet + `\.` + octet + `\.` + octet + `\.` + octet + `\b`
+	ipv6Addr = `([0-9a-fA-F]{1,4}:([0-9a-fA-F]{1,4}:([0-9a-fA-F]{1,4}:([0-9a-fA-F]{1,4}:([0-9a-fA-F]{1,4}:[0-9a-fA-F]{0,4}|:[0-9a-fA-F]{1,4})?|(:[0-9a-fA-F]{1,4}){0,2})|(:[0-9a-fA-F]{1,4}){0,3})|(:[0-9a-fA-F]{1,4}){0,4})|:(:[0-9a-fA-F]{1,4}){0,5})((:[0-9a-fA-F]{1,4}){2}|:(25[0-5]|(2[0-4]|1[0-9]|[1-9])?[0-9])(\.(25[0-5]|(2[0-4]|1[0-9]|[1-9])?[0-9])){3})|(([0-9a-fA-F]{1,4}:){1,6}|:):[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){7}:`
+	ipAddr   = `(` + ipv4Addr + `|` + ipv6Addr + `)`
+	port     = `(:[0-9]*)?`
+)
+
+// AnyScheme can be passed to StrictMatchingScheme to match any possibly valid
+// scheme, and not just the known ones.
+var AnyScheme = `([a-zA-Z][a-zA-Z.\-+]*://|` + anyOf(SchemesNoAuthority...) + `:)`
+
+// SchemesNoAuthority is a sorted list of some well-known url schemes that are
+// followed by ":" instead of "://".
+var SchemesNoAuthority = []string{
+	`bitcoin`, // Bitcoin
+	`file`,    // Files
+	`magnet`,  // Torrent magnets
+	`mailto`,  // Mail
+	`sms`,     // SMS
+	`tel`,     // Telephone
+	`xmpp`,    // XMPP
+}
+
+func anyOf(strs ...string) string {
+	var b bytes.Buffer
+	b.WriteByte('(')
+	for i, s := range strs {
+		if i != 0 {
+			b.WriteByte('|')
+		}
+		b.WriteString(regexp.QuoteMeta(s))
+	}
+	b.WriteByte(')')
+	return b.String()
+}
+
+func strictExp() string {
+	schemes := `(` + anyOf(Schemes...) + `://|` + anyOf(SchemesNoAuthority...) + `:)`
+	return `(?i)` + schemes + `(?-i)` + pathCont
+}
+
+func relaxedExp() string {
+	site := domain + `(?i)` + anyOf(append(TLDs, PseudoTLDs...)...) + `(?-i)`
+	hostName := `(` + site + `|` + ipAddr + `)`
+	webURL := hostName + port + `(/|/` + pathCont + `?|\b|$)`
+	return strictExp() + `|` + webURL
+}
+
+// Strict produces a regexp that matches any URL with a scheme in either the
+// Schemes or SchemesNoAuthority lists.
+func Strict() *regexp.Regexp {
+	re := regexp.MustCompile(strictExp())
+	re.Longest()
+	return re
+}
+
+// Relaxed produces a regexp that matches any URL matched by Strict, plus any
+// URL with no scheme.
+func Relaxed() *regexp.Regexp {
+	re := regexp.MustCompile(relaxedExp())
+	re.Longest()
+	return re
+}
+
+// StrictMatchingScheme produces a regexp similar to Strict, but requiring that
+// the scheme match the given regular expression. See AnyScheme too.
+func StrictMatchingScheme(exp string) (*regexp.Regexp, error) {
+	strictMatching := `(?i)(` + exp + `)(?-i)` + pathCont
+	re, err := regexp.Compile(strictMatching)
+	if err != nil {
+		return nil, err
+	}
+	re.Longest()
+	return re, nil
+}