Docs: improve Pages overview (to deprecate feature page)

See merge request gitlab-org/gitlab-ee!7509

Geo: Fix Hashed Storage QA spec

Closes #7791

See merge request gitlab-org/gitlab-ee!7531

Quick actions docs table

See merge request gitlab-org/gitlab-ee!7599

Geo - Add a bang suffix to Geo::EventStore#create method

Closes #5323

See merge request gitlab-org/gitlab-ee!7566

The Geo::EventStore#create method doesn't have a ! on the end
of it. It should, since its behaviour is to raise an exception
if the validation or the save fails.

Add mysql_compatible_index_length to migration helpers

Closes #50253

See merge request gitlab-org/gitlab-ce!21852

Add mysql_compatible_index_length to migration helpers (EE)

See merge request gitlab-org/gitlab-ee!7448

CE upstream - 2018-09-28 12:21 UTC

See merge request gitlab-org/gitlab-ee!7589

Fix job_details.json schema

Closes #51927

See merge request gitlab-org/gitlab-ce!21983

Rename date related labels for Epics

Closes #7308

See merge request gitlab-org/gitlab-ee!7447

closes https://gitlab.com/gitlab-org/gitlab-ce/issues/51927

Clarify subgroup permissions

See merge request gitlab-org/gitlab-ce!21769

CE upstream - 2018-09-28 09:21 UTC

See merge request gitlab-org/gitlab-ee!7585

Documentation: Fix broken link of feature proposal template in issue_workflow.md

See merge request gitlab-org/gitlab-ce!21894

Fix karma out-of-memory failures

See merge request gitlab-org/gitlab-ce!21912

Rename block scope local variable in table pagination spec

See merge request gitlab-org/gitlab-ce!21969

Change class .label to .badge for 2FA label in group members view

See merge request gitlab-org/gitlab-ce!21759

CE upstream - 2018-09-27 21:21 UTC

Closes #1801, gitlab-ce#50181, and gitlab-ce#51925

See merge request gitlab-org/gitlab-ee!7570

Fix html rendering in api settings documentation

Closes #7784

See merge request gitlab-org/gitlab-ee!7569

Docs: improve Issue Boards overview (to deprecate feature page)

Closes #50503

See merge request gitlab-org/gitlab-ce!21905

Docs: improve Issue Boards overview (to deprecate feature page)

See merge request gitlab-org/gitlab-ee!7483

Resolve "Geo: Does not mark repositories as missing on primary due to stale cache"

Closes #50211 and #44044

See merge request gitlab-org/gitlab-ce!21789

I attempted to refactor so that the caller of `wrap_method` passes in a
block, rather than a method name, but I was unsuccessful.

I kept getting the following error:

NoMethodError:
        undefined method `cache_method_output' for Repository:Class

If you can figure this out, then feel free to dry up these class methods
again without doing a send-within-a-send.

* Only truthy values are cached in Redis.
* All values are cached in RequestStore and in an instance variable.

- Artifacts left behind by a previous merge conflict resolution caused
  a table on the api settings page to render improperly. Removed the
  stray '=======' and fixed the problem.

Resolves: #7784
Signed-off-by: Robert Marshall <rmarshall@gitlab.com>

And reuse `Gitlab::Utils::StrongMemoize`.

There is a subtle behavior change required to reuse StrongMemoize in
this case. The early fallback check now occurs *before* reading the
memoized value instead of after.

I think this is fine since a memoized value should only exist if
`exists?` is also already memoized as `true`.