* upstream/master: (237 commits)
  Grapify boards API
  Add test, fix merge error
  Use local assigns to get the dropdown title
  Updated issuable dropdown titles
  Added safety check for formatted values
  Minor style improvement
  Fixed conflict and corrected teaspoon test
  Rename method in test
  Moved ci_status environments logic to new action ci_envrionments_status and set up frontend polling
  Refactor ci_status on MergeRequestController
  Fix indenting error in HAML
  Show what time ago a MR was deployed
  Fixed missing links
  Fixed missing links
  Refactor merge requests revisions
  Add link to update docs for source installations
  Grapify todos API
  Link to review apps example from docs
  fix grafana_configuration.md move link
  Do not run before_script, artifacts, cache in trigger_docs job
  ...

Also add a safeguard for non-CI env.

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Move reply by email docs to a new location

## What does this MR do?

Move reply by email docs to a new location.

Part of https://gitlab.com/gitlab-org/gitlab-ce/issues/3349

## Moving docs to a new location?

See the guidelines: http://docs.gitlab.com/ce/development/doc_styleguide.html#changing-document-location

- [ ] Make sure the old link is not removed and has its contents replaced with a link to the new location.
- [ ] Make sure internal links pointing to the document in question are not broken.
- [ ] Search and replace any links referring to old docs in GitLab Rails app, specifically under the `app/views/` directory.
- [ ] If working on CE, submit an MR to EE with the changes as well.

See merge request !6517

Signed-off-by: Rémy Coutable <remy@rymai.me>

* upstream/master: (292 commits)
  Deletes extra empty line breaking the build
  Optimize the `award_user_list` helper spec
  Fix typo and add he MWBS accronym for "Merge When Build Succeeds"
  Added missing content and improved layout
  ExpireBuildArtifactsWorker query builds table without ordering enqueuing one job per build to cleanup
  Improve the contribution and MR review guide
  Updates test in order to look for link
  Make projects API docs match parameter style
  Fix Event#reset_project_activity updates
  Update user whitelist reject message
  Call ensure_secret_token! in secret token test's before block since it would be called in an initializer.
  Add a CHANGELOG for CacheMarkdownField
  Enable CacheMarkdownField for the remaining models
  Make search results use the markdown cache columns, treating them consistently
  Use CacheMarkdownField for notes
  Add markdown cache columns to the database, but don't use them yet
  Update issue board spec
  Link to Registry docs from project settings
  Truncate long labels with ellipsis in labels page
  Improve issue load time performance by avoiding ORDER BY in find_by call
  ...

Memoize Github::Shell's secret token

## What does this MR do?

`API::Helpers#secret_token` was reading the secret file on every invocation. This MR reads the file in the `gitlab_shell_secret_token.rb` initializer and saves it as a class variable at `Gitlab::Shell.secret_token`

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

 - I'm not sure if the use of `cattr_accessor` is the best approach, or if should be moved into the `class << self` block?
 - Should `API::Helpers#secret_token` be removed in favor of using `Gitlab::Shell.secret_token`?

## Why was this MR needed?

Performance optimization.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/22510

See merge request !6599

This commit adds a number of _html columns and, with the exception of Note,
starts updating them whenever the content of their partner fields changes.

Note has a collision with the note_html attr_accessor; that will be fixed later

A background worker for clearing these cache columns is also introduced - use
`rake cache:clear` to set it off. You can clear the database or Redis caches
separately by running `rake cache:clear:db` or `rake cache:clear:redis`,
respectively.