import: read X-Mercurial-Node email header to determine nodeid
This would be useful to import and obsolete patches sent using 'hg email
--plain', using evolve's --obsolete option of 'hg import'.
If email body contains Mercurial patch header ('# HG changeset patch'
block), nodeid parsed from X-Mercurial-Node header will still be
overridden by respective value found in body.
from __future__ import absolute_import
import pkgutil
__path__ = pkgutil.extend_path(__path__, __name__)