DESCRIPTION
Branch switching wasn't possible in earlier versions. If user deploys
"master" branch first and then wants to switch to "pages" branch, they
would have to delete the Pages-managed copy of the repository to
re-initialize the repository.
This patch introduces changes to switch to user configured branch on
startup and at each repository update.
This server will only see occasional traffic so it makes sense to spawn
only limited number of workers as opposed to spawning one worker/thread,
which is the default behavior.
I recommend at least two workers.
