path: move handling of "default" (*) suboptions value inside __init__
With the introduction of `path://` scheme the handling of default value will need to be subtler. We do simple code movement first to clarify the future changes.
Differential Revision: https://phab.mercurial-scm.org/D10260
# mercurial.revlogutils -- basic utilities for revlog
#
# Copyright 2019 Pierre-Yves David <pierre-yves.david@octobus.net>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import