Update robots.txt disallow to allow users/groups starting with "s"

## What does this MR do?

Update robots.txt "Disallow: /s" line to "Disallow: /s/"

## Why was this MR needed?

Currently any Project that is under a username or group name that starts with "s" cannot be indexed because of this disallow line.

For example on https://gitlab.com looking at the projects with the most stars there is this project: https://gitlab.com/somerobots/Trident

If you do a Google search for "site:gitlab.com Trident", the project comes up but with "A description for this result is not available because of this site's robots.txt"

Adding the trailing slash will still disallow all snippet short urls, but start allowing projects where the URI begins with "s"

See merge request !6481

Fixed a broken documentation link to the wiki-specific-markdown.

## What does this MR do?
Fixes a broken link

## Are there points in the code the reviewer needs to double check?
Well, it's a one line change, so it couldn't hurt, right?

## Why was this MR needed?
Because broken links make us look like chumps. :)

## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?
Probably not.

## What are the relevant issue numbers?
Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/21760.

See merge request !6117

Keep API mounts in alphabetical order

## What does this MR do?

Just a cosmetic change to keep the API mounts in order.

See merge request !6515

Fixes issue with rails reserved keyword type exporting/importing services.

The attribute `type`in services was being ignored by Import/Export. Added `type` as a method call in the export, as `type` gets ignored invoking `to_json`, manually adding this as a method in `import_export.yml` solves the problem. 

On a different note, I found assigning a title directly to `CustomIssueTrackerService` didn't play very well with `prop_accessor`:

```ruby
> CustomIssueTrackerService.new(title: 'asdf')
NoMethodError: undefined method `[]=' for nil:NilClass
> CustomIssueTrackerService.new(title: nil)
NoMethodError: undefined method `[]=' for nil:NilClass
```

This was also causing the Import/Export to failed... So I added a custom setter that fixed the problem.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/22461

See merge request !6499

Replace deprecated Devise helper with new helper

Closes #22357

See merge request !6462

Fix trivial typo in docs



See merge request !5849

Fixes issue with rails reserved keyword type exporting/importing services. Also fixed CustomIssueTrackerService title setter and added relevant specs.

Remove gitlab_meta gem



See merge request !6510

Fix typo in README

[ci skip]

See merge request !6512

cannonical -> canonical

Use base SHA for patches and diffs

## What does this MR do?

Switch from using 'start SHA' to 'base SHA' for patches and diffs

## Are there points in the code the reviewer needs to double check?

## Why was this MR needed?

Makes the downloaded patches and diffs on the merge request page match the frontend-rendered "changes" in these scenarios:

* Unpatched gitlab-workhorse, downloading patchsets of open MRs (https://gitlab.com/gitlab-org/gitlab-workhorse/merge_requests/68)
* Unpatched gitlab-workhorse, downloading diffs of open and merged MRs
* Patched gitlab-workhorse, downloading patchsets of merged merge requests

## What are the relevant issue numbers?

Closes #22229

See merge request !6435

Fix typo in README.md

## What does this MR do?

Fixes a typo in the documentation of the gitlab-ci-runner environment variables

See merge request !6340

Fix CHANGELOG.

cc: @stanhu

See merge request !6505

Milestone tab badges

### What does this MR do?
Adds count badges to the tabs on the Milestone page to mirror the Issue page.

### Are there points in the code the reviewer needs to double check?
CSS: Padding was added to the `.milestone` element to make expired milestones look good.

### Why was this MR needed?
For consistency with other tabs

### What are the relevant issue numbers?
Closes #20114 

### Screenshots (if relevant)

**Before**
<img src="/uploads/1f75853a863a9058ee409916b7ee4057/Screen_Shot_2016-07-22_at_13.22.20.png" width="362">

**After**
<img src="/uploads/8a058290850f571db249dd9b23f5138d/Screen_Shot_2016-07-22_at_13.21.58.png"  width="303">

![Screen_Shot_2016-08-23_at_1.42.56_AM](/uploads/b072dc6bdf505b2fce46660beaf0eae7/Screen_Shot_2016-08-23_at_1.42.56_AM.png)

![Screen_Shot_2016-08-23_at_1.43.15_AM](/uploads/e7440bf2aa628aa4dba63863083699c0/Screen_Shot_2016-08-23_at_1.43.15_AM.png)

### Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [ ] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5946

Removed z-index from flash container

## What does this MR do?

Fixes a styling bug where the flash container would be above the header when scrolling.

Before it looked like this when scrolling:

![Screen_Shot_2016-09-08_at_14.06.36](/uploads/d639287329643d26454a997e3917bc53/Screen_Shot_2016-09-08_at_14.06.36.png)

Now it looks like this when scrolling:

![Screen_Shot_2016-09-08_at_14.07.37](/uploads/7c1c5e38adc9b9011558d4190d3520fe/Screen_Shot_2016-09-08_at_14.07.37.png)

## Are there points in the code the reviewer needs to double check?

I can't think of any good reason why this would need to be above another element. But you never know!

Closes #20713 

See merge request !6264

Merge branch '22459-tooltips-for-mini-pipeline-graph-in-pipeline-list-use-the-svg-instead-of-container' into 'master'

Fixed pipeline stage svg link tooltip

## What does this MR do?

Adds `display: block` to the `.stage-container` class which allows the dimensional constraints of the link to be calculated correctly so the `mouseover` events are fired correctly.

## Are there points in the code the reviewer needs to double check?

## Why was this MR needed?

Hovering the stage icons to reveal their SVG was buggy and would flash.

## Screenshots (if relevant)

![2016-09-23_14.59.17](/uploads/ad4c85fb08f032cc3f5d17749d3f7091/2016-09-23_14.59.17.gif)

I just realised that Gifox actually adds its own mouse that isn't positioned or sized correctly so this doesn't look right, you'll have to `checkout` to confirm.

/cc @dimitrieh I found a con about Gifox! 😆 

## Does this MR meet the acceptance criteria?

- [ ] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [ ] All builds are passing
- [ ] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [ ] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [ ] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?


Closes #22459

See merge request !6494

Fix a memory leak in HTML::Pipeline::SanitizationFilter::WHITELIST

See merge request !6456

Add link to broadcast messages docs

[ci skip]

See merge request !6495

Allows projects in groups starting with "s" while still disallowing the
snippets short urls.

Fix database seeds for development environment

## What does this MR do?

This MR fixes database seeds for development environment and adds CI test for it.

## Why was this MR needed?

Database seeds for development environment are often broken, and we are not able to catch that when someone modified `db/fixtures` and forgets to reseed database.

Closes #22422

See merge request !6475

Changed links that wrap the icon svg to `display: block` so there isn't any issues knowing when `mouseover` occurs

The previous fix introduced another leak; as it made
Banzai::Filter::SanitizationFiler#customized? always return false, so we
were always appending two elements to
HTML::Pipeline::SanitizationFilter::WHITELIST[:elements]. This growth in
the elements array would slow the sanitization process over time.

This reverts commit 504a3b5e.

[ci skip]
Signed-off-by: Rémy Coutable <remy@rymai.me>

Speed up group milestones show page

See merge request !6457

[ci skip]
Signed-off-by: Rémy Coutable <remy@rymai.me>

Fix Cycle Analytics landing widget state and improve state management in Vue.

## What does this MR do?
- Fixes Cycle Analytics help widget show/hide issue
- Addresses initial MR feedback with improving Vue state management logic
- Fixes cookie path of the help widget so when you close a help widget in a repo it won't be visible for other repos.

## Are there points in the code the reviewer needs to double check?
- Should we move `gl.cycleAnalyticsModel` to a new file.

## Why was this MR needed?
- Addresses feedbacks of [initial MR](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/5986) and fixes #22483

## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?

- [ ] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [x] API support added
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?
Fixes #22483

See merge request !6492

Fixes #22508
[ci skip]

Makes Cycle analytics mobile friendly

## What does this MR do?
Makes Cycle analytics page mobile friendly

## Are there points in the code the reviewer needs to double check?

## Why was this MR needed?
Cycle analytics page was not mobile friendly

## Screenshots (if relevant)
![optionB](/uploads/a1d7f2f4db100e1a8aa76c0156ef8641/optionB.png)

## Does this MR meet the acceptance criteria?

- [ ] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [ ] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [ ] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?
fixes #22444

See merge request !6482

Make Gitlab::Redis.params safe for mutation

Would have avoided https://gitlab.com/gitlab-com/infrastructure/issues/464

Defends in depth against programming mistakes.

See merge request !6472