EPEL6: add lxc back, use lxc driver for docker, require libcgroup
BZ 1080799 - bump to 0.9.1
Update to new upstream release 0.10.0

Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com>
include manpages from contrib
update commit value, regenerate epel btrfs removal patch