Adding orphan topics to the documentation global navigation
This MR adds orphan topics to the documentation global navigation, and relocates one topic up one level in the nav tree.
Move incoming email topic out of WebUI section, up one level:
Add topics to global navigation:
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Postfix: https://docs.gitlab.com/ee/administration/reply_by_email_postfix_setup.html
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Sidekiq health check: https://docs.gitlab.com/ee/administration/sidekiq_health_check.html
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S/MIME signing: https://docs.gitlab.com/ee/administration/smime_signing_email.html
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Read-only state: https://docs.gitlab.com/ee/administration/read_only_gitlab.html
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Restart GitLab: https://docs.gitlab.com/ee/administration/restart_gitlab.html
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Link to the merge request of the new page:
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Give the MR a descriptive title. -
Link to the merge request that introduced the new page.