Fix another instance of "created at"

Replace it with "created on".

Change-Id: Ibd26bf82d2e64f142a4f3be6da7701e5b035602f
Database doc changes to address #2412 and #6451.
Fixed Unicorn-Sidekiq confusion in GitLab init script.

There were a few places in the included init script where
Unicorn was referred to as Sidekiq and vice-versa.

This fixes #126.
Update 6.0-to-6.5.md

A lot of users get authentication errors after this upgrade. Reason being the change in 6.5 that secure cookies when using https. A link to this would be very handy for other upgraders!

https://github.com/gitlabhq/gitlab-public-wiki/wiki/Trouble-Shooting-Guide#cant-verify-csrf-token-authenticitycant-get-past-login-pageredirected-to-login-page
Nice trick for css class check mentioned by Dmitriy.
 Merge branch 'bugfix/fix_unicorn-sidekiq_confusion_in_gitlab_init_script' into 'master'

Fix Unicorn-Sidekiq Confusion In GitLab Init Script

This merge request fixes issue #126 by updating a few sections of the included GitLab init file where Unicorn was referred to as Sidekiq and vice-versa.
Add the tests for user search.
Change the user search query to be case insensitive.
Additional check in the test.
Change Diff to Changes in views.
Ldap check recognize ldap user filter.
 Merge branch 'rename_mr_diff_tab' into 'master'

Rename Diff to Changes
 Merge branch 'case_insensitive_user_search' into 'master'

Case insensitive user search

As per implementation by Christopher Arnold.
 Merge branch 'check-css' into 'master'

Check Css

Based on Dmitriy his remark https://gitlab.slack.com/archives/general/p1395770459000142
Refactor Parallel Diff feature and add scrollbars

Also now removed lines relating to unused comments feature
Update permissions.md
 Merge branch 'ldap_check' into 'master'

gitlab:ldap:check uses LDAP user filter
Merge branch 'master' of github.com:gitlabhq/gitlabhq
Merge branch 'master' of gitlab.com:gitlab-org/gitlab-ce
Merge pull request #6610 from Datacom/feature/parallel_diff_scrollbars_pr2

Refactor Parallel Diff feature and add scrollbars