For example in containers case there might be a number
of controllers mounted on the node which we should not
carry inside image when container is migrated. So
add ability to dump predefined controllers only
specified via command line --cgroup-dump-controller
option.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>