Add 'gitaly' service (off by default)
It should just be another Runit service. Gitlab.rb options we need:
-
gitaly['enable']
(like every other runit service) gitaly['bin_path']
-
gitaly['env']
standard 'env dir' for all other configuration
We do NOT need to build the gitaly executable inside omnibus at this point (see gitaly#24 (closed)).