Document that GitLab need the cluster to be created with basic auth and
cert and why. Also note we have started explicitly enabling this so that
we are ready when these settings are disabled by default in GKE 1.12

From 1.12, GKE will disable basic auth and client certificate by
default. Explicitly enable those now (currently we use 1.10/1.11
clusters) so that GKE cluster configuration will continue to work.

Refactor AutoDevOps test to one test with two expectations

See merge request gitlab-org/gitlab-ce!25836

Add table entries from EE docs

See merge request gitlab-org/gitlab-ce!25995

Add core-js polyfill for Promise.finally()

See merge request gitlab-org/gitlab-ce!25925

Fix health checks not working behind load balancers

Closes #58573

See merge request gitlab-org/gitlab-ce!26055

Seed tablesample strategy

Closes #58791

See merge request gitlab-org/gitlab-ce!25966

The change in
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/24199 caused
requests coming from a load balancer to arrive as 127.0.0.1 instead of
the actual IP.

`Rack::Request#ip` behaves slightly differently different than
`ActionDispatch::Request#remote_ip`: the former will return the first
X-Forwarded-For IP if all of the IPs are trusted proxies, while the
second one filters out all proxies and falls back to REMOTE_ADDR, which
is 127.0.0.1.

For now, we can revert back to using `Rack::Request` because these
middlewares don't manipulate parameters. The actual fix problem involves
fixing Rails: https://github.com/rails/rails/issues/28436.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/58573

This produces stable approximate counts among invocations unless the
table changed.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/58791.

Merge branch '58739-hashed-storage-prevent-a-migration-and-rollback-running-at-the-same-time' into 'master'

Hashed Storage: Prevent a migration and rollback running at the same time

Closes #58739

See merge request gitlab-org/gitlab-ce!25976

Backports EE change for expanded pipelines

See merge request gitlab-org/gitlab-ce!26043

Allow gitlab:ui:visual to fail

See merge request gitlab-org/gitlab-ce!26042

Cache Repository#root_ref within a request

Closes #58684

See merge request gitlab-org/gitlab-ce!25903

Fix counting of groups in admin dashboard

Closes gitlab-ee#7435

See merge request gitlab-org/gitlab-ce!26009

Resolve CE to EE differences in the lib/api directory

See merge request gitlab-org/gitlab-ce!25430

This is a small polishing on the storage migration and storage rollback
rake tasks. By aborting a migration while a rollback is already
scheduled we want to prevent unexpected consequences.

Remove some easy factories from migration specs

See merge request gitlab-org/gitlab-ce!26025

Remove fake repository_path response - resolved issue# 50386

Closes #50386

See merge request gitlab-org/gitlab-ce!25942

The repository_path is no longer needed since
https://gitlab.com/gitlab-org/gitlab-shell/merge_requests/231, which closes
https://gitlab.com/gitlab-org/gitlab-shell/issues/135.

Authenticate the internal API using a header

See merge request gitlab-org/gitlab-ce!25924

When an empty project is loaded in the UI, there are 15 separate Gitaly
FindDefaultBranch calls to determine the root_ref. Previously, it was
not cached even within the request. This change caches it within the
request so only a single FindDefaultBranch RPC is needed.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/58684

Update feature proposal template with "Intended users"

See merge request gitlab-org/gitlab-ce!25906

Revert "Merge branch 'gitaly-version-v1.28.0' into 'master'"

See merge request gitlab-org/gitlab-ce!26037

Update rack-oauth2 1.2.1 -> 1.9.3

Closes #21732

See merge request gitlab-org/gitlab-ce!17868

Fixed sticky headers in merge request creation diff

Closes #57691

See merge request gitlab-org/gitlab-ce!26027

This reverts merge request !26026

Merge branch '58797-broken-ui-on-a-closed-merge-request-from-a-deleted-source-project' into 'master'

Fix UI for closed MR when source project is removed

Closes #58797

See merge request gitlab-org/gitlab-ce!25967

Tag asset docker image with GitLab version also

See merge request gitlab-org/gitlab-ce!26029

Quarantine failing test

See merge request gitlab-org/gitlab-ce!26028

Upgrade Gitaly to v1.28.0

See merge request gitlab-org/gitlab-ce!26026

Keep inline as much as possible in system notes on issuable

Closes #58789

See merge request gitlab-org/gitlab-ce!25968

Use curl silent/show-error options on Auto DevOps' deploy

Closes #58781

See merge request gitlab-org/gitlab-ce!25954