Temporary fix for #4305: Cant preview attached png images on notes; attachment.secure_url returns an url which is accessible
Merge remote-tracking branch 'upstream/master' into fix-4305
Commit message textareas have 72 char mark line.
Expose archive status of projects in API

That way clients like Gitlab CI can decide to show or hide projects
based on that information
Add info about exposed Project::archived to API docs
start to make the monthly release doc a step by step guide
improve headers, add details
add ee, ci and patch release
Merge branch 'master' into monthly-revision

Conflicts:
	doc/release/monthly.md
remove redundancy, remove really good joke, add step to release
monthly doc tweet template, small changes
Added email threading for update emails on issues and merge requests (if the mail client support the References: mail header)
Now using correct ids as reference if we are informing about a new note.
Added some tests.
Remove old mixins

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Add box shadow to issue box

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Change header color in network page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'mixin-cleanup' into 'master'

Mixin cleanup

* Remove old mixins
* add issue box shadow
* change color for network graph box
Backup wiki repo even if the main repo is empty

This fixes a bug where wiki repositories for projects with an empty main
repository would not get backed up.
Merge branch 'backup_wiki_skip_bug' into 'master'

Fix wiki backup skip bug