Setup non-pushing gerrit instance for glibc.

[Jonathan Nieder]

Florian Weimer wrote:

> Gerrit's notion of a rebases and conflicts is a bit unclear to me.  I
> think it doesn't run the real Git behind the scenes, so it can't know
> what kind of conflicts can be resolved by automated merging.

Gerrit uses JGit, which does perform automated merging.  It is an
independent implementation from Git --- there's no guarantee that
their behavior always matches each other, but if one is worse in a
particular case then the relevant project would consider it a bug.

Thanks,
Jonathan