This reverts commit 670e1be7.

This reverts commit b5cd66d4.

Updated the relative links in ## Contents to point to the correct documents.

Additional unicorn -> puma reference update

Updated incorrect/outdated references to unicorn.rb; changed to puma.rb

Change-Id: Ib71ce8cf993627eada63d7d596fb302ec702f36e

Added ability to add and remove the forked from/to relatioinship
between existing repos.

I've moved the instruction in question to the the 
'Configure GitLab DB settings'. Can't change permission to a file that doesn't already exist 😉

This includes standard markdown as well as GitLab extended markdown as well as references to documents used.

Recompiling assets on the update is needed or main menu appearance may not load properly. This has been mentioned on issues #3722 and #3978.

The command has been tested several by users on those issues and by myself.

Thanks for your time and attention.

Fix spelling error and make sure you never log in as git user so you never have to logout to run sudo.

s 3599: Add snippets_enabled flag to projects for API

Replace missing comma