launch systemd-logind if available
only launch logind in saucy and trusty
moar logind
use find to recursively umount /sys for bootstrap
escape croutonversion call in enter-chroot
add basic logind test
don't rbind /sys if it's already bind-mounted

If enter-chroot is called twice for the same chroot, we don't want
slave mounts like the systemd cgroup to get blown away.
test: ensure systemd cgroup is set up in chroot
enter-chroot: mkdir /sys if needed
only run logind test if release is supported
Merge pull request #699 from smibarber/logind

Launch systemd-logind if available
mkdir /sys at a reasonable time
Merge pull request #816 from smibarber/howdoimkdirsys

mkdir /sys at a reasonable time
croutonversion: Print error message on wget failure
Merge pull request #820 from drinkcat/croutonversion-printerror

croutonversion: Print error message on wget failure
Revert "Merge pull request #750 from drinkcat/xephyr-fullscreen"

Upstream bug has been fixed in xorg-xephyr 1.15.1, and this version is
now packaged in all affected releases.

This reverts commit f9ed015f64dacea14d70c019f62e00b88a81a803, reversing
changes made to 23bb77d4abb1b8e876566129ea717b2796de323e.
Merge pull request #827 from drinkcat/xephyr-fullscreen-revert

Revert "Merge pull request #750 from drinkcat/xephyr-fullscreen"
remove cinnamon target
Merge pull request #832 from smibarber/remove-cinnamon

remove cinnamon target with much chagrin
Fix enter-chroot on old chroots. Fixes #837