Handle Geo node URL parse errors intelligently

Closes #4158

See merge request gitlab-org/gitlab-ee!3552

svg icon fix

See merge request gitlab-org/gitlab-ee!3565

By storing the URL unmodified in the database, parsing it can happen at
validation time, rather than during data entry. This allows problems to be
reported to the end-user via the errors hash, rather than an exception.

Fix Advanced Search Syntax documentation

See merge request gitlab-org/gitlab-ee!3571

Update gitlab_slack_application.md to include direct link to slack app in directory

See merge request gitlab-org/gitlab-ee!3561

Merge branch 'ee-38962-automatically-run-a-pipeline-when-auto-devops-is-turned-on-in-project-settings' into 'master'

Add checkbox to automatically run a pipeline when Auto DevOps is turned on in project settings -- EE merge edition

Closes gitlab-ce#38962

See merge request gitlab-org/gitlab-ee!3578

Fix viewing default push rules on a Geo secondary

Closes #4110

See merge request gitlab-org/gitlab-ee!3559

Port of CE branch '21143-customize-branch-name-when-using-create-branch-in-an-issue '

See merge request gitlab-org/gitlab-ee!3554

Add border for epic edit button

Closes #3909

See merge request gitlab-org/gitlab-ee!3506

Fix tasklist for epics

Closes #4021

See merge request gitlab-org/gitlab-ee!3435

[EE] Add timeouts for Gitaly calls

See merge request gitlab-org/gitlab-ee!3541

CE upstream

Closes omnibus-gitlab#2988 et gitlab-com/infrastructure#3260

See merge request gitlab-org/gitlab-ee!3570

this is not a great way to do this. But using currentColor for these
means we are competing with this selector:
 ul.content-list li a

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/38962

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/38962

Conflicts:
	app/services/projects/update_service.rb
	spec/services/projects/update_service_spec.rb

Add feature flag to use gitaly-ssh mirroring when cloning internal repos

Closes gitaly#739

See merge request gitlab-org/gitlab-ee!3479

Add a section on Connection flows

Closes gitlab-org/build/team-tasks#28

See merge request gitlab-org/gitlab-ee!3562

Geo - Does not sync repos on unhealthy shards in non-backfill conditions

Closes #3690

See merge request gitlab-org/gitlab-ee!3540

As part of the architecture, say what ports are used by what services
when.  This should add value in debugging data flows, and opening
firewalls.