add rake tasks for web hooks management
add help page for web hooks management using rake tasks
Check whether only one sidekiq is running
Merge branch 'only_one_sidekiq' of /home/git/repositories/gitlab/gitlabhq
rewrite issues search test to prevent ajax requests running after test
[gitlab:check] Fix detecting the status of sidekiq

If you are running another sidekiq instance on your server, e.g. GitLab
CI, the check script would parse the output of `ps aux` searching for
`sidekiq` and returning success, although the GitLab sidekiq may not be
running.

Now the `ps` call will only print the processes run by the GitLab user.
Merge pull request #5191 from jojosch/fix-check-script-sidekiq

[gitlab:check] Fix detecting the status of sidekiq
Update databases.md

run mysql_secure_installation to secure the freshly installed mysql server
Merge pull request #3006 from jweslley/master

add rake tasks for web hooks management
Respect authorization in Repository API

* dont allow protect/unprotect branches for users without master permissions
* dont allow access to Repository api for guests
Merge branch 'master' of github.com:gitlabhq/gitlabhq