Support new issue creation by email without subaddressing for EE

See merge request gitlab-org/gitlab-ee!8806

Don't run checks for changed refs when specific changes are unknown

See merge request gitlab-org/gitlab-ee!8800

Documentation: Make correction to URL, from https://about.gitab.com/handbook/documentation/...

See merge request gitlab-org/gitlab-ce!24137

Make correction to URL, from https://about.gitab.com/handbook/documentation/ to https://about.gitlab.com/handbook/documentation/ (I searched to see if this is a duplicate of an existing fix, didn't find one)

Geo: Improve non-Omnibus database documentation

Closes #8221

See merge request gitlab-org/gitlab-ee!8917

Update `include` parameter usage description

See merge request gitlab-org/gitlab-ce!24118

Update `include` parameter usage description

See merge request gitlab-org/gitlab-ee!8874

Clean up the GPG docs and mention push rules

Closes gitlab-ce#42363

See merge request gitlab-org/gitlab-ee!8975

Fix clone URL not showing if protocol is HTTPS

Closes #55896

See merge request gitlab-org/gitlab-ce!24131

Resolve "Add markdown editing buttons to the file editor"

Closes #27861

See merge request gitlab-org/gitlab-ce!23480

Add Knative metrics to Prometheus

See merge request gitlab-org/gitlab-ce!23972

Geo: Ignore invalid attributes when updating Geo node status

Closes #8966

See merge request gitlab-org/gitlab-ee!8957

GitLab 11.6.2 fixed the case for HTTP. However, HTTPS still did
not work because the protocol returned to `http_enabled?`
was the actual protocol in use (e.g. `https` instead of `http`).

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/55896

Geo: Fix metrics updates when secondary nodes are cached

Closes #9000

See merge request gitlab-org/gitlab-ee!8981

Refactor tracing settings

See merge request gitlab-org/gitlab-ee!8983

Added Comment to user avatar Image, Changed Fixtures to created ones, added shadow color

See merge request gitlab-org/gitlab-ce!23768

targeting the service desk email handler

# Conflicts:
#	lib/gitlab/email/handler.rb

including verifying the project_slug

We now appended `-` and the project id in order
to support catch all email addresses

We now use `-issue` in order to support catch all email addresses

We now use `-merge-request` instead of `+merge-request+`
in order to support catch all email addresses

We now use `-unsubscribe` instead of `+unsubscribe`
in order to support catch all email addresses

If replication has not caught up properly on the secondary,
it was possible for a primary Geo node to attempt an update
of the GeoNodeStatus entry with a `nil` ID, resulting
in an Error 500.

We handle this in two ways:

1. On the primary, ignore `id` and other unknown attributes.
2. On the secondary, never send `id`.

Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/8966

Due to https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8802,
`Gitlab::Geo.secondary_nodes` can return an Array instead of an
ActiveRecord relation if the value is retrieved from the cache.  Fix
this by using `each` instead of `find_each`, since loading a few GeoNode
records into memory shouldn't be a big deal.

Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/9000

Fix missing QA selector in note_form.vue

Closes #9033

See merge request gitlab-org/gitlab-ee!9010

Integrate mobile CSS framework into specific frameworks

Closes #54386

See merge request gitlab-org/gitlab-ce!23301