* upstream/master: (353 commits)
Put some admin settings in dropdown
Add styleguide on configuration settings documentation
Remove Duplicated keys add UNIQUE index to fingerprint
Avoid autoload issue such as 'Mail::Parsers::AddressStruct'
Move appearance settings as sub tab to application settings
use rails root join
fixed a couple of errors spotted in production
Fix RangeError exceptions when referring to issues or merge requests outside of max database values
Fix bug in `WikiLinkFilter`.
Grammar and typographic changes to artifacts documentation
Tweak grammar
Small frontend code fixes and restore 8a2d88f commit
Warn about admin privilege to disable GitHub Webhooks
Listing GH Webhooks doesn't stop import process for non GH admin users
fixup! updated docs for api endpoint award emoji
Update CHANGELOG
Ensure Todos counters doesn't count Todos for projects pending delete
Add endpoints for award emoji on notes
Sort API endpoints and implement feedback
Add endpoints for Award Emoji
...
Implement custom notification level options


part of #12758
See merge request !4389
* upstream/master: (337 commits)
Update CHANGELOG for !4659
Center the header logo for all Devise emails
Add previews for all customized Devise emails
Customize the Devise `unlock_instructions` email
Customize the Devise `reset_password_instructions` email
Customize the Devise `password_change` emails
Use gitlab-git 10.2.0
Use Git cached counters on project show page
Fix indentation scss-lint errors
Added title attribute to enties in tree view Closes#18353
Banzai::Filter::ExternalLinkFilter use XPath
Reduce queries in IssueReferenceFilter
Use gitlab_git 10.1.4
Fixed ordering in Project.find_with_namespace
Fix images in emails
Banzai::Filter::UploadLinkFilter use XPath
Turn Group#owners into a has_many association
Make project_id nullable
CHANGELOG [ci skip]
CHANGELOG [ci skip]
...
Resolve "Track the number of new Redis connections per transaction"
## What does this MR do?
Add a new metric counter, `new_redis_connections`, that contains the number of calls to `Redis::Client#connect` in the current transaction.
## Are there points in the code the reviewer needs to double check?
Not sure. I tested this in kind of a brute-force way:
1. Add a debugger in the monkey-patched `connect` method.
2. With metrics enabled, start the app and load a page.
3. The first Redis connection is created by `Rack::Attack` and isn't in a transaction, but still works fine.
4. The second Redis connection is within a transaction (the page load), and increments the counter.
5. If I reload the page, neither debugger is hit.
6. If I use a Redis client and do `CLIENT KILL` on my two existing clients, then reload the page, I get 3 and 4 again.
7. If I disable metrics collection, the debugger never gets hit.
## Why was this MR needed?
We may have a Redis connection leak somewhere, so adding metrics will let us track this.
## What are the relevant issue numbers?
Closes#18451.
## Screenshots (if relevant)
Hahaha nope, not relevant.
## 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 [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)
cc @yorickpeterse
See merge request !4649
* prefer-assign_to:
Give 409 Conflict whenever the runner was already enabled
We're checking return value rather than rescuing exceptions
Prefer Runner#assign_to instead of creating directly
* master: (147 commits)
Update CHANGELOG
Remove deprecated issues_tracker and issues_tracker_id from project
Schema doesn’t reflect the changes of the last 3 migrations
Revert CHANGELOG
Also rename "find" in the specs
Change to new Notes styleguide
Add guide on changing a document's location
Change logs.md location in README
Move logs/logs.md to administration/logs.md
Make "four phase test"
Only show branches for revert / cherry-pick
Instrument all Banzai::ReferenceParser classes
Removed old comment from update_column_in_batches
Update columns in batches until no rows are left
Remove counters from Pipeline navigation
Handle NULL migration errors in migration helpers
Fix typo causing related branches to Error 500
Improved SVG sanitizer specs to include smoke tests for clean.
Refactored SVG sanitizer
Added SVG sanitizer fix to the changelog
...
Improve Gitlab::Auth method names
Auth.find was a very generic name for a very specific method.
Auth.find_in_gitlab_or_ldap was inaccurate in GitLab EE where it also
looks in Kerberos.
See merge request !4589
It doesn't seem possible to set constraints based on format for project
IDs ending in .git, so set the constraint on the ID and ensure the
format is nil to avoid the case where the project ID is something like
project.git.foo.
* commit 'ca3c5c295ed653b483fe81c3918ffe60f46666b9':
Let contributors know where to start
Ensure branch cleanup regardless of whether the import process succeeds
Fix failing todo tests
Reorder the todos because the use of the project finder attempts to order them differently
Update target todo test to use a public project
Use the project finder in the todos finder to limit todos to just ones within projects you have access to.
Move filtering todos by projects not pending deletion into a scope on the todo model
Reduce the filters on the todos joins project query by being explicit about the join
Ensure we don't show TODOS for projects pending delete
Fix deprecation warnings in spec/services/issues/bulk_update_service_spec.rb
Remove unused Issuable#is_assigned? method
fixup! Don't allow merges with new commits
fixup! Add `sha` parameter to MR accept API
Reduce Namespace queries in UserReferenceFilter
Added ReferenceFilter#nodes
Returning enums in ReferenceFilter#each_node
Don't allow merges with new commits
Add `sha` parameter to MR accept API