None of this code can be reached any more, so it can all be removed

Bootsnap speeds up Rails loading and now ships by default with Rails 5.2
apps. We should promote this to a default gem and test it out in
production. This will also make it possible for the Helm Charts to take
advantage of this.

It appears that Bootsnap with Rails 5.2.3 and all the GitLab CE gems
loads fine on an ARM platform now, so it's possible that
https://gitlab.com/gitlab-org/gitlab-ce/issues/34799 has been resolved.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/45230

peek-redis resets its counters at the start of an ActionController
notification (`start_processing.action_controller`), which causes it to
miss some Redis queries that precede it, such as the database load
balancer and Rack Attack queries. This produces inconsistencies in the
performance bar between the number of calls and their durations with the
actual calls in the detailed view.

We fix this by getting rid of peek-redis in favor of consolidating all
logic into the `RedisDetailed` view, which tracks Redis queries using
`RequestStore`. This has the nice property of removing thread-specific
counters as well.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/64707

This will make it possible for Oracle Cloud to work with S3 by disabling
Signature V4 streaming (https://github.com/fog/fog-aws/issues/523).

Full CHANGELOG:
https://github.com/fog/fog-aws/blob/master/CHANGELOG.md

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/63041

This was done to perform some local testing, but while the change was
already made it made sense to commit the change.

Updates changed method names and fixes spec failures

Adds more friendly docs for GraphQl implementation

This brings the rspec-core version in line with the Gitaly changes
and introduces Rails 5.1/5.2 improvements.

Full CHANGELOG:
https://github.com/rspec/rspec-rails/blob/master/Changelog.md

The configuration is currently only specified in CI, by moving it into
`.mdlrc` we get immediate feedback locally in supported editors.

To ensure `mdl` is available it's also added to the `Gemfile`, though
CI will still use the version installed in the `gitlab-docs-lint` image.

This fixes a critical error where a nil exception would be hit
if an error occurred while logging a Prometheus metric:

https://gitlab.com/gitlab-org/prometheus-client-mmap/merge_requests/36

This release includes continued improvements to the library, fixes for a
number of lexers and support for three new languages:
https://github.com/rouge-ruby/rouge/releases

This removes a warning message when prometheus_multiproc_dir is not set.

Currently, MergeToRefService is specifically designed for
createing merge commits from source branch and target branch of
merge reqeusts. We extend this behavior to source branch and any
target ref paths.

Signed-off-by: NRémy Coutable <remy@rymai.me>

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

This matches the version used in Gitaly, bumps the gRPC version to be
aligned with GitLab CE/EE, and adds gRPC interceptor support:
https://gitlab.com/gitlab-org/labkit-ruby/compare/v0.2.0...v0.3.0

This saves some space by matching the version used by Gitaly. List of
changes:

* https://github.com/msgpack/msgpack-ruby/blob/master/ChangeLog
* https://github.com/msgpack/msgpack-ruby/compare/v1.2.6..v1.2.10

This saves some disk space by matching the version used in Gitaly.

Only minor changes:
https://github.com/mime-types/mime-types-data/blob/master/History.md

See http://asciidoctor.org/docs/user-manual/#include-directive

Fix whitespace in specs because normalize_ws is slightly
different from Capybara 2 behavior

In https://gitlab.com/gitlab-org/gitlab-ce/issues/62208, users were
seeing 404 errors when they configured their OpenID provider without a
name parameter since OmniAuth would use the name `openidconnect` instead
`openid_connect`.

https://github.com/m0n9oose/omniauth_openid_connect/pull/23 makes the
default parameter `openid_connect` so this additional initializer in
GitLab is not necessary. Plus, this change enables users to use multiple
OpenID Connect providers if they desire.

Signed-off-by: NRémy Coutable <remy@rymai.me>

CE port of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/13460

This gem allows you to get the `EXPLAIN ANALYZE` query plan, directly
from the Rails console.

The gem is installed with `require: false`, but if it was loaded on
launch, this would be it's memory load:

```
TOP: 145.3086 MiB
  rails/all: 22.4844 MiB
  ...
  activerecord-explain-analyze: 2.9648 MiB
    active_record/connection_adapters/postgresql_adapter: 2.9648 MiB
      pg: 2.9648 MiB
        pg_ext: 2.9648 MiB
  ...
```

This matches the version used in Gitaly and avoids potential
version conflicts when multiple versions are installed.

It assures that requests are aborted after 60 seconds, otherwise
an exception is raised. This exception is logged by Sentry, also
there is a Prometheus counter for measuring number of requests in each
state.

This reverts commit 744f1f2e, reversing
changes made to c4d930e5.

This reverts merge request !27514

This removes the warning when using Ruby 2.6:

BigDecimal.new is deprecated; use BigDecimal() method instead.

This also adds Rails 5 support, which eliminates the need for the monkey
patch to handle
https://github.com/thoughtbot/shoulda-matchers/issues/913.

Signed-off-by: NUtkarsh Gupta <guptautkarsh2102@gmail.com>

This reverts merge request !27474

Signed-off-by: NRémy Coutable <remy@rymai.me>

Part of adding Let's Encrypt certificates for pages domains

Add acme-client gem

Client is being initialized by private key stored in secrets.yml
Let's Encrypt account is being created lazily.
If it's already created, Acme::Client just gets account_kid by
calling new_account method

Make Let's Encrypt client an instance
Wrap order and challenge classes