Docs: add link to the docs site from /help landing page

See merge request gitlab-org/gitlab-ee!8639

Resolve conflicts for
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8634

Resolve conflicts for https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8634

Resolve conflict in https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8634

Resolve conflicts for https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8634

Move EE only differences for finders

Closes #8599

See merge request gitlab-org/gitlab-ee!8629

EE port of " Add a rebase API endpoint for merge requests"

See merge request gitlab-org/gitlab-ee!8623

[master] EE Resolve "Personal access token with only `read_user` scope can be used to authenticate any web request"

See merge request gitlab/gitlab-ee!726

[master] Operations settings page visible to reporter users

See merge request gitlab/gitlab-ee!724

[master] Fixed XSS in merge request approvers

Closes #353

See merge request gitlab/gitlab-ee!662

[master] Stored XSS in Operation Page

See merge request gitlab/gitlab-ee!722

# Conflicts:
#	app/controllers/application_controller.rb
#	app/controllers/projects/issues_controller.rb
#	app/controllers/projects_controller.rb
#	app/views/projects/commits/_commit.html.haml
#	doc/README.md
#	locale/gitlab.pot
#	spec/models/project_spec.rb

[ci skip]

[master] Authorize user when listing board resources

Closes gitlabhq#2738

See merge request gitlab/gitlab-ee!721

[master] Resolve: Guest can set weight of a new issue

See merge request gitlab/gitlab-ee!720

[master] Fix IDOR at /drafts/publish/

Closes #356

See merge request gitlab/gitlab-ee!710

[master ee] Fixed ability to comment on and edit/delete comments on locked or confidential issues

See merge request gitlab/gitlab-ee!739

[11.5] Fix SSRF in project integrations

See merge request gitlab/gitlabhq!2611

[master] Resolve: "Provide email notification when a user changes their email address"

See merge request gitlab/gitlabhq!2587

[master] Resolve "Reflected XSS in OAuth Authorize window due to redirect_uri allowing arbitrary protocols"

See merge request gitlab/gitlabhq!2572

[master] Fix CRLF issue in UrlValidator

See merge request gitlab/gitlabhq!2627

[master] Resolve "Personal access token with only `read_user` scope can be used to authenticate any web request"

See merge request gitlab/gitlabhq!2583

[master]Fixed ability to comment on and edit/delete comments on locked or confidential issues

See merge request gitlab/gitlabhq!2612

[master] [pages] Possible symlink time of check to time of use race condition

Closes #2742

See merge request gitlab/gitlabhq!2638

[master] XSS in markdown following unrecognized HTML element

Closes #2732

See merge request gitlab/gitlabhq!2599

[master] Fix XSS in mermaid diagrams

See merge request gitlab/gitlabhq!2597

[master] Don't expose confidential information in commit message list

See merge request gitlab/gitlabhq!2626

[master] Resolve: Promoting a milestone is missing an authorization check

See merge request gitlab/gitlabhq!2598

[master] Do not follow redirects in prometheus service

See merge request gitlab/gitlabhq!2617

[master] Stored XSS for Environments

Closes #2727

See merge request gitlab/gitlabhq!2594

[master] Fixed read private group names

See merge request gitlab/gitlabhq!2589

[Master] Redact sensitive information on gitlab-workhorse log

See merge request gitlab/gitlabhq!2584