* Merge with Debian unstable. Remaining Ubuntu changes:
  - dh_installinit: Add --upstart-only and --onlyscripts-upstart modes.
  - Add various autoscripts for above: postinst-upstart,
    postinst-upstart-replace, postinst-upstart-restart,
    prerm-upstart, prerm-upstart-norestart, preinst-removeconffile.
  - dh_installudev: Handle conffile migration from old Ubuntu defaults
    (needed until after the next LTS release).