Import the database as the `git` user

This ensures that all tables created during the import belong to `git`.
If you import as a different user, such as the `postgres` superuser, you
may encounter issues where the GitLab database user cannot access tables
in gitlabhq_production, _even if_ `git` is the owner of
gitlabhq_production at the time of import.
API: ability to set an import url when creating project for a specified user
update API docs
Added ability to serve files in wiki repository

From #6168.
ensure that uid is a string
Update markdown reference to external issues

1. Issue may be not only in jira.
2. Rewrite method for support different external issue trackers
prevent events loading while loading events refs #49759
Update 6.9-to-7.0.md

fix gitlab.yml example diff command
fix high cpu usage issue that occured in Firefox

fixes issue related with #342 (Merge Request view causes 100% CPU in firefox)
Delete mailer queue because we don't use sidekiq_mailer gem and now the mailer queue doesn't exist any more.
change bash to sh
fix bash-ism
Added public groups area to enhance searching and exploring of projects

fixed whitespaces and quotes

fixed whitespaces

fixed devise.html.haml

fixed method parenthesis in app/models/group.rb

removed links from header

removed links from devise.html

added tests
Fix milestones description's max length
Do not sent a generated password via email for admin created user.
Do not set password expiry.
Update specs.
Use a better name for token.
Gitlab::Git::Compare in Satellite::CompareAction
Removed some constant allready defined warnings

Signed-off-by: Jeroen van Baarsen <jeroenvanbaarsen@gmail.com>