config: clarify that config is only enabled on the repository is it setup for This changeset change nothing but clarify a few thing. The ui passed to 'reposetup' is the same as 'repo.ui'. However we would like to clarify things a bit.

# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil
__path__ = pkgutil.extend_path(__path__, __name__)