* Add SUBJECT_PREFIX mailer config option

* Add space between subject prefix and subject (Change from Gogs)

Signed-off-by: Andrew Thornton <art27@cantab.net>

This is a header used to suggest mail servers not to respond to a message
with an auto-responder:

 https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/ms-oxcmail/ced68690-498a-4567-9d14-5c01f974d8b1

This header is also used by github and gitlab in outgoing messages.

Fixes #6484

* Panic don't fatal on create new logger

Fixes #5854

Signed-off-by: Andrew Thornton <art27@cantab.net>

* partial broken

* Update the logging infrastrcture

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Reset the skip levels for Fatal and Error

Signed-off-by: Andrew Thornton <art27@cantab.net>

* broken ncsa

* More log.Error fixes

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Remove nal

* set log-levels to lowercase

* Make console_test test all levels

* switch to lowercased levels

* OK now working

* Fix vetting issues

* Fix lint

* Fix tests

* change default logging to match current gitea

* Improve log testing

Signed-off-by: Andrew Thornton <art27@cantab.net>

* reset error skip levels to 0

* Update documentation and access logger configuration

* Redirect the router log back to gitea if redirect macaron log but also allow setting the log level - i.e. TRACE

* Fix broken level caching

* Refactor the router log

* Add Router logger

* Add colorizing options

* Adjust router colors

* Only create logger if they will be used

* update app.ini.sample

* rename Attribute ColorAttribute

* Change from white to green for function

* Set fatal/error levels

* Restore initial trace logger

* Fix Trace arguments in modules/auth/auth.go

* Properly handle XORMLogger

* Improve admin/config page

* fix fmt

* Add auto-compression of old logs

* Update error log levels

* Remove the unnecessary skip argument from Error, Fatal and Critical

* Add stacktrace support

* Fix tests

* Remove x/sync from vendors?

* Add stderr option to console logger

* Use filepath.ToSlash to protect against Windows in tests

* Remove prefixed underscores from names in colors.go

* Remove not implemented database logger

This was removed from Gogs on 4 Mar 2016 but left in the configuration
since then.

* Ensure that log paths are relative to ROOT_PATH

* use path.Join

* rename jsonConfig to logConfig

* Rename "config" to "jsonConfig" to make it clearer

* Requested changes

* Requested changes: XormLogger

* Try to color the windows terminal

If successful default to colorizing the console logs

* fixup

* Colorize initially too

* update vendor

* Colorize logs on default and remove if this is not a colorizing logger

* Fix documentation

* fix test

* Use go-isatty to detect if on windows we are on msys or cygwin

* Fix spelling mistake

* Add missing vendors

* More changes

* Rationalise the ANSI writer protection

* Adjust colors on advice from @0x5c

* Make Flags a comma separated list

* Move to use the windows constant for ENABLE_VIRTUAL_TERMINAL_PROCESSING

* Ensure matching is done on the non-colored message - to simpify EXPRESSION

* Create log mailer for testing email settings

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Switch on the log mailer for the integration tests

This ensures that the sending mail process works

Signed-off-by: Andrew Thornton <art27@cantab.net>

* rename the from user for mysql/mssql

* rename log sender to dummy sender

* update the integration tests

* explicitly decide on using TLS for mail connections

* explicitly decide on using TLS for mail connections

* keep compatibility

* Add support for extra sendmail arguments

* Sendmail args to exec.command should be a list

* Add go-shellquote package

* Use go-shellquote lib for parsing Sendmail args

* Only parse if sendmail is configured

* Fix sending mail with a non-latin display name. #2102

Signed-off-by: Rémi Saurel <contact@remi-saurel.com>

* Take into account the possibility that setting.MailService.From is in `name <email@address>` format. #2102

Signed-off-by: Rémi Saurel <contact@remi-saurel.com>

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

* Send mails as HTML as default. Setting for send as plain text.
 * Add new option SendAsPlainText. remove EnableHTMLAlternative
 * Send HTML mails as default
 * Add html check if html2text should be performed

* Send only multipart or plain. Add deprication warning for ENABLE_HTML_ALTERNATIVE

* Still use ENABLE_HTML_ALTERNATIVE for backward compatibility

* Changed to not ignore html2text errors

This change corrects a few logging issues:

 * Standardized formatting errors with '%v'.
 * Standardized failure warning word usage.
 * Corrected an instance of using the standard log library when
   the gitea log library should be used instead.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

* Implemented sendmail. This piggybacks on existing configuration to keep the change simple

* Changed privicy of new sendSMTP and sendSendmail functions

* Fixed Lint errors

* Seperated SMTP and sendmail into their own senders

* Making new structs private as they should not be used externally now

* Added sendmail setting to ini file

* Minor code cleanup

- Update import paths from github.com/go-gitea to code.gitea.io
- Fix import path for travis

See https://docs.travis-ci.com/user/languages/go#Go-Import-Path

* Do not write HTML in text/plain mail part

Fixes #2928

* Pass text/plain first, text/html second

* Do not send plain/text email if html2text failed (untested)

Also fix a possible race condition while install

- #1496: fallback plain text
- #1002: add date header
- #913: fix encoding of header

i've been missing a 'r' in previous, lol~

- fix delete user but repository watches are not decreased

New config keys in [mailer] section:
 - CERT_FILE: path to a certificate file.
 - KEY_FILE: path to a key file.