initd: attempt to mount cgroup2

Prepare for using cgroup2 in procd and ujail.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

initd/early.c

@@ -60,7 +60,7 @@ early_mounts(void)
 	if (!is_container()) {
 		mount("proc", "/proc", "proc", MS_NOATIME | MS_NODEV | MS_NOEXEC | MS_NOSUID, 0);
 		mount("sysfs", "/sys", "sysfs", MS_NOATIME | MS_NODEV | MS_NOEXEC | MS_NOSUID, 0);
-		mount("cgroup", "/sys/fs/cgroup", "cgroup",  MS_NODEV | MS_NOEXEC | MS_NOSUID, 0);
+		mount("cgroup2", "/sys/fs/cgroup", "cgroup2",  MS_NODEV | MS_NOEXEC | MS_NOSUID | MS_RELATIME, "nsdelegate");
 		mount("tmpfs", "/dev", "tmpfs", MS_NOATIME | MS_NOSUID, "mode=0755,size=512K");
 		ignore(symlink("/tmp/shm", "/dev/shm"));
 		mkdir("/dev/pts", 0755);