parse.y: extending cgroup names with "default"

parse.y: extending cgroup names with "default"

default is used as a keyword for defining default group permissions. Having "default" as a group name (with double quotes "), parsing is successfull. Howerver, using default without double quotes, parsing fails. This patch modifies parsing rule and lex for default group name without double quotes.

Tested on:

default {
	perm {
		task {
			uid = root;
			gid = rgel6610;
			fperm = 770;
		}
		admin {
			uid = root;
			gid = root;
			dperm = 775;
			fperm = 744;
		}
	}
}

group default {
        cpuset {
                cpuset.mems = 0;
                cpuset.cpus = 0;
        }
}

Signed-off-by: Jan Chaloupka <jchaloup@redhat.com>
Acked-by: Jan Safranek <jsafrane@redhat.com>