MAINTAINERS: mptcp@ mailing list is moderated

Note that mptcp@lists.01.org is moderated, like we note for
other mailing lists.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Mat Martineau <mathew.j.martineau@linux.intel.com>
Cc: Matthieu Baerts <matthieu.baerts@tessares.net>
Cc: netdev@vger.kernel.org
Cc: mptcp@lists.01.org
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -11641,7 +11641,7 @@ NETWORKING [MPTCP]
 M:	Mat Martineau <mathew.j.martineau@linux.intel.com>
 M:	Matthieu Baerts <matthieu.baerts@tessares.net>
 L:	netdev@vger.kernel.org
-L:	mptcp@lists.01.org
+L:	mptcp@lists.01.org (moderated for non-subscribers)
 W:	https://github.com/multipath-tcp/mptcp_net-next/wiki
 B:	https://github.com/multipath-tcp/mptcp_net-next/issues
 S:	Maintained