Document gitaly.socket_path setting
What does this MR do?
Add a new config section to gitlab.yml.
Are there points in the code the reviewer needs to double check?
No.
Why was this MR needed?
To give guidance to people who want to enable Gitaly in GitLab 9.0 source installations. Gitaly is still optional.
Does this MR meet the acceptance criteria?
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Changelog entry added -
Documentation created/updated -
API support added - Tests
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Added for this feature/bug -
All builds are passing
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Conform by the merge request performance guides -
Conform by the style guides -
Branch has no merge conflicts with master(if it does - rebase it please) -
Squashed related commits together