Make httpclient respect system SSL configuration

Closes charts/gitlab#1436

See merge request gitlab-org/gitlab-ce!30749

Migrate null values for users.private_profile column

See merge request gitlab-org/gitlab-ce!29888

- Background migration for changing null values to false
- Set false as default value for private_profile DB column

Reorder fields in boards schema to match EE

See merge request gitlab-org/gitlab-ce!30751

Hide restricted and disallowed visibility radios

See merge request gitlab-org/gitlab-ce!30590

This eliminates conflicts between CE and EE db/schema.rb files.

By default, httpclient (and hence anything that uses rack-oauth2)
ignores the system-wide SSL certificate configuration in favor of its
own `cacert.pem`. This makes it impossible to use custom certificates
without patching that file. Until
https://github.com/nahi/httpclient/pull/386 is merged, we work around
this limitation by forcing the `HTTPClient` SSL store to use the default
system configuration.

Closes https://gitlab.com/charts/gitlab/issues/1436

Show a message if many levels are restricted and a
different message if all levels are restricted.

Always return MR diff_refs if importing

See merge request gitlab-org/gitlab-ce!30630

Fix race condition with polling when saving notes

Closes gitlab-ee#12472

See merge request gitlab-org/gitlab-ce!30724

Reorder application settings in db/schema.rb to match EE

See merge request gitlab-org/gitlab-ce!30715

Ensure quick help links have the same color

Closes #64266

See merge request gitlab-org/gitlab-ce!30478

Add docs on how alert attributes are used

See merge request gitlab-org/gitlab-ce!30736

Convert more product badges to round brackets

See merge request gitlab-org/gitlab-ce!30719

Add note to GEO documentation about database upgrade

See merge request gitlab-org/gitlab-ce!30647

* Point to the omnibus documentation for how to upgrade the cluster
* Document how to disable the upgrade procedure

Update dependency scanning to add new variable

See merge request gitlab-org/gitlab-ce!30528

(CE Port) Set max width for onboarding popover

See merge request gitlab-org/gitlab-ce!30619

GitLab Managed App ensure helm version uses tls opts

Closes #63694

See merge request gitlab-org/gitlab-ce!30654

Display boards filter bar on mobile

Closes #45864

See merge request gitlab-org/gitlab-ce!30120

Docs: Pages - refactor "Custom domain / SSL" documentation

Closes #47585, #60612, #44606, and #63753

See merge request gitlab-org/gitlab-ce!30363

- Move steps to new doc
- Move all concepts to different docs

Add Namespace#feature_available no-op

Closes #60908

See merge request gitlab-org/gitlab-ce!30641

Resolve "Add size 96 to avatar sizes in avatar.scss"

Closes #64499

See merge request gitlab-org/gitlab-ce!30671

Add a note about implicit Dockerfile serverless runtime

See merge request gitlab-org/gitlab-ce!30672

expand (CD) acronym

See merge request gitlab-org/gitlab-ce!30646

Add example of ENV variables for image and services.

See merge request gitlab-org/gitlab-ce!27320

Verified snippet works with 11.10.1

Rename "discussions" to "threads" in docs

See merge request gitlab-org/gitlab-ce!30037

Filter Geo proxied data from api_json.log

See merge request gitlab-org/gitlab-ce!30687