Rational: current installation of rootfs to default subvolume
makes a post-install flat subvolume structure (recommended!)
unnecessarily difficult to accomplish.
This is untested and unlikely to work without parted support.
Committing what I have since I don't trust btrfs to preserve the data. ;-)
Note to translators: Probably not worth wasting your time with this yet.
Have not run debconf-updatepo.
r62090