Make "Two-factor" casing consistent throughout the application

See merge request !2662

[ci skip]

Improve GitLab flow documentation regarding the WIP merge requests



See merge request !2647

Mark inline difference between old and new paths when a file is renamed

See merge request !2652

Increase the minimum length for commit SHA matching to 7

This is the git default and will help to prevent false positive matches.

Closes #12706

See merge request !2655

Cache BroadcastMessage.current. Fixes #12770



See merge request !2633

Warn admin of granting admin rights during OAuth

Fixes #3951

Warning style the same as the warning a user sees on a archived project.



![Screenshot_from_2016-01-25_20-06-33](/uploads/42e6a218b963311fd20c0b7c87c8cf4f/Screenshot_from_2016-01-25_20-06-33.png)


See merge request !2601

This is the git default and will help to prevent false positive matches.

Closes #12706

Fixed typo for PRIVATE-TOKEN header

Was PRIVATE_TOKEN but should be PRIVATE-TOKEN.
Underscore vs. kebab-case.

See merge request !2624

add missing `RAILS_ENV=production` bit to bundle command

[ci skip]

See merge request !2626

Fix "old version" warning when viewing wiki page's latest version via version_id in URL

Fixes #12712

See merge request !2627

Increase LFS objects size column

Fixes #12745 

Increases the `size` column integer limit to an 8-byte integer. This allows for a max value of `9223372036854775807` which is 9,223,372,036 GB. That should do it 😃 

I tested this by first reproducing the error (push a file larger than 2.1 GB). The error was:

```
RangeError (3145728000 is out of range for ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Integer with limit 4):
  lib/gitlab/lfs/response.rb:232:in `store_file'
  lib/gitlab/lfs/response.rb:170:in `render_lfs_upload_ok'
  lib/gitlab/lfs/response.rb:51:in `block in render_storage_upload_store_response'
  lib/gitlab/lfs/response.rb:204:in `render_response_to_push'
  lib/gitlab/lfs/response.rb:50:in `render_storage_upload_store_response'
  lib/gitlab/lfs/router.rb:76:in `put_response'
  lib/gitlab/lfs/router.rb:20:in `try_call'
  lib/gitlab/backend/grack_auth.rb:41:in `call'
  lib/gitlab/backend/grack_auth.rb:18:in `call_with_kerberos_support'
  lib/gitlab/backend/grack_auth.rb:8:in `call'
```

Then I ran this migration and pushed the file again. It uploaded successfully.


See merge request !2644

Auto-focus emoji award search field

![emoji-search-focus](/uploads/7cd0448e00ced19d3cf1c4fdd141c74f/emoji-search-focus.gif)

Closes #12621 

cc. @jschatz1 

See merge request !2650

Background process note logic for #3948

Quick and dirty way to get *most* of the note processing out of band and into the background. Seeing some pretty nice speed bumps. Keep in mind that doing this in process results in slower and slower responses as more notes are added and more participants exist.

```
without background processing
  Completed 200 OK in 627ms (Views: 0.5ms | ActiveRecord: 32.3ms)
  Completed 200 OK in 478ms (Views: 0.8ms | ActiveRecord: 28.3ms)
  Completed 200 OK in 1107ms (Views: 0.6ms | ActiveRecord: 36.6ms)

with background processing
  Completed 200 OK in 108ms (Views: 0.6ms | ActiveRecord: 4.7ms)
  Completed 200 OK in 78ms (Views: 0.5ms | ActiveRecord: 4.5ms)
  Completed 200 OK in 164ms (Views: 0.5ms | ActiveRecord: 8.3ms)
```

As you can see, speeds are consistent when doing the harder work out of process. I'm not sure the number of sql queries we're saving, but based on the logs alone it's a pretty good amount.

@dzaporozhets @yorickpeterse I would love some input on this.

See merge request !2631

Partially revert "Add IP check against DNSBLs at account sign-up"

This partially reverts 6a5cd3ca - we keep the migration and add a new
migration that reverts it in order to keep migration history intact.

See merge request !2643

Closes #12621

Prevent transient Capybara timeouts during feature tests

The problem occurred because asset compilation takes a long time, so
when the asset cache didn't exist and the first test ran, it would often
(randomly) time out during the generation before the actual test even
had a chance to run.

Now we check if the cache exists before the suite runs, and if not, we
manually fire a request to the root URL in order to generate it. This
should allow subsequent tests to use the cached assets.

See merge request !2646

Revert "Revert "Remove the `:coffee` and `:coffeescript` Haml filters""

This reverts commit b0145d76.

See merge request !2642

[ci skip]

fix syntax error on 2.1 and rubocop on 2.2

Background:

Hashes `{:'key': 'value'}` are not valid in 2.1 but are recommended by Rubocop on 2.2. We only use those when we have a key such as `weird-key`, `weird.key`, etc... 

We could disable Rubocop but it wouldn't warn us about the recommended syntax since `Ruby 1.9`: `{key: 'value'}`, which is valid for `Ruby 1.9+`.

Workaround 1 could be disabling `Style/HashSyntax:` in `rubocop.yml`. 

Workaround 2 (tried in this MR) is to trick Rubocop using `.to_sym` which is effectively the same as adding the `:`. This would allow to keep the warning in place.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/12801

See merge request !2637

The problem occurred because asset compilation takes a long time, so
when the asset cache didn't exist and the first test ran, it would often
(randomly) time out during the generation before the actual test even
had a chance to run.

Now we check if the cache exists before the suite runs, and if not, we
manually fire a request to the root URL in order to generate it. This
should allow subsequent tests to use the cached assets.

This partially reverts 6a5cd3ca - we keep the migration and add a new
migration that reverts it in order to keep migration history intact.

Correctly determine MR diff base when MR has merge conflicts

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/12779

See merge request !2632

Fix highlighting in blame view.

See merge request !2630

This reverts commit b0145d76.