I am stupid. fsname_is_auto() can't use strtok(), the 2nd call will
see zeroes instead of commas in fsauto_names.

Add the css_contains() helper and change fsname_is_auto() to use it.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>