This is a take over from a community contribution:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/20990

Skip TeamCity push event when related to branch delete

Support merge request events for TeamCity service.
Add checkbox for merge request triggers in the TeamCity
configuration page.

Mention Container Scanning NFS bug and how to fix it

Closes gitlab-ee#11429

See merge request gitlab-org/gitlab-ce!29908

Clean up the web terminals docs

See merge request gitlab-org/gitlab-ce!29929

Renders pre-release tag for pre-releases

See merge request gitlab-org/gitlab-ce!29797

- Clarify that they are available only for private Runners
- Merge the two sections of file syncing into one

Update rouge

See merge request gitlab-org/gitlab-ce!29541

https://github.com/rouge-ruby/rouge/blob/master/CHANGELOG.md#version-341-2019-06-13

Merge branch '63406-selecting-a-line-in-ci-job-trace-using-triple-click-selects-the-previous-line-also' into 'master'

Fix copying a single line from Firefox

Closes #63406

See merge request gitlab-org/gitlab-ce!29832

Add ability to reorder issues

See merge request gitlab-org/gitlab-ce!29012

Add packages nav to group sidebar [CE backport]

See merge request gitlab-org/gitlab-ce!29592

Don't show private keys for letsencrypt certs

See merge request gitlab-org/gitlab-ce!29359

Adds enum certificate_source to pages_domains table
with default manually_uploaded

Mark certificates as 'gitlab_provided'
if the were obtained through Let's Encrypt

Mark certificates as 'user_provided' if they were uploaded through
controller or api

Only show private key in domain edit form if it is 'user_provided'

Only show LetsEncrypt option if is enabled by application settings
(and feature flag)

Refactor and fix some specs to match new logic

Don't show Let's Encrypt certificates as well

to support manual sorting on the frontend

Sanitize LDAP output in Rake tasks

Closes #56131

See merge request gitlab-org/gitlab-ce!28427

The various LDAP check Rake tasks have long supported a SANITIZE
environment variable. When present, identifiable information is
obscured such as user names and project/group names. Until now,
the LDAP check did not honor this. Now it will only say how many
users were found. This should at least give the indication that
the LDAP configuration found something, but will not leak what
it is. Resolves #56131

Add new troubleshooting step and refactor Geo replication docs

Closes #63210

See merge request gitlab-org/gitlab-ce!29783

Fixed formatting of notes bullet list

See merge request gitlab-org/gitlab-ce!29923

Disallow `NULL` values for `geo_nodes.primary` column

Closes gitlab-ee#12061

See merge request gitlab-org/gitlab-ce!29818

Backport and Docs for Paginate license management and add license search

See merge request gitlab-org/gitlab-ce!27602

Add back trimChar method to remove trailing +/-

Closes #59028

See merge request gitlab-org/gitlab-ce!29518

Add test for checking output

When a release is a pre release, we render
an orange badge with `pre-release` label

Resolve "Race condition in fetching Kubernetes token causes missing `$KUBECONFIG`"

Closes #63507

See merge request gitlab-org/gitlab-ce!29922

Enabled complex ci variable expression statements by default

See merge request gitlab-org/gitlab-ce!29904

Do not rewrite relative links for system notes

Closes #63162

See merge request gitlab-org/gitlab-ce!29825

Since Kubernetes is creating the Secret and token asynchronously it is
necessary that we implement some delay or retrying logic to avoid a race
condition where we fetch a Secret before the token is even set. There
does not appear to be any way for us to force it to be set with any
synchronous API call so retrying seems to be the only option.

Remove Kubernetes service from deployment platform

See merge request gitlab-org/gitlab-ce!29786

Docs: Change wording

See merge request gitlab-org/gitlab-ce!29746

Remove fallback to platform credentials for managed project-level clusters

Closes #62772

See merge request gitlab-org/gitlab-ce!29262

Project-level clusters that made use of this legacy
behaviour have been migrated to unmanaged clusters,
so we are now free to remove this fallback.

This will no longer be used for deployments, as all
service templates have been migrated to clusters.

Migrate managed clusters that aren't using managed features to unmanaged

Closes #62772

See merge request gitlab-org/gitlab-ce!29251

Migrate clusters with no token to unmanaged

Closes #62772

See merge request gitlab-org/gitlab-ce!29648

Omit issues links in merge request entity API response

Closes #63546

See merge request gitlab-org/gitlab-ce!29917

using_docker_images.md: fix config.json path

See merge request gitlab-org/gitlab-ce!29791

The merge request widget has a section that includes which issues may be
closed or mentioned based on the merge request description. The problem
is that rendering and redacting Markdown can be expensive, especially
since the browser polls for the data every 10 seconds.

Since these links don't change much and are just nice to have, we only
load them on first page load. The frontend will use the existing data if
the data doesn't appear on subsequent requests.

This saves about 30% of the rendering time of this endpoint, which adds
up to significant savings considering that
`MergeRequestsController#show.json` is called over a million times a day
on GitLab.com.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/63546