httppeer: explicitly catch urlerr.httperror and re-raise
On Python 3 it seems urllib.error.HTTPError doesn't set the .args
field of the exception to have any contents, which then breaks our
socket.error catch. This works around that issue.
Differential Revision: https://phab.mercurial-scm.org/D2448
# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil
__path__ = pkgutil.extend_path(__path__, __name__)