Documentation: cgroup: "unshare -C" to unshare cgroup namespace

Use "unshare -C" to be consistent with the unshare utility from util-linux

Signed-off-by: Josef Lusticky <josef@lusticky.cz>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
1 file changed