Add message that repes_path should be real path

Regex used in rm-key command is too lax

Basically the issue is that 'gitlab-shell rm-key key-2' removes all keys that match "key-2" pattern.
"key-20", "key-25", etc.
This change makes the regex used in the sed command more strict.

In the main gitlab config there is a message that this should be the real path, meaning it looks like it can be the symlinked path in this config, experience shows this is not the case.

https can be served also on non-standard port

Added configuration options for custom redis servers as well as bin locations

Fix permissions for SSH with StricModes onn

add fork_project command

Change-Id: I0c343c03ee3f033641f9958030ac57d92296547d

Change-Id: I1b3d64d79187c414e326928a96427d1cc6176224

Change-Id: Ia48a93ccbfea6fdc0791ce25cf3e6291bfe7fa08

Refactored update hook as well as fixed a typo. GitlabConfig is now only called once in the update hook.

Added socket support to redis configuration directive per drf's request at https://github.com/gitlabhq/gitlab-shell/pull/35