Daemon dns, group, ip, iptable, bridge etc

based on https://github.com/autotest/autotest-docker/pull/256
We have many tests that use ``--force`` and unf. ``--stop`` is NOT a drop-in replacement.  We might consider opening a bug on this because the behavior changes in very important ways.  In any case, I suggest sticking with ``--force`` for a kind of strange reason:  We're going to need to add version-dependant handling of this, and it's easier to search down all the ``--force`` than a mix :grinning: