Add a placeholder for CT destruction

We don't really need it, but upstream linux will.
Whenever we destroy a container in there, this will translate to
destructing the cgroup files it has. So we'll need a cleanup hook.

I am adding it here in the function pointer list for completion.

Signed-off-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
2 files changed