hgext3rd/__init__.py

rhg: make rhg recognise it supports zstd compression for revlogs

It already did, but was not aware of it.

Differential Revision: https://phab.mercurial-scm.org/D10324

# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil

__path__ = pkgutil.extend_path(__path__, __name__)