MAINTAINERS: mention lockd and sunrpc in nfs entries

The actual division of labor is a little vague in some of the common
code, but if the patches get to one of us then we can sort it out.
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>

MAINTAINERS

@@ -2418,7 +2418,7 @@ L:	kernel-janitors@vger.kernel.org
 W:	http://www.kerneljanitors.org/
 S:	Maintained
 
-KERNEL NFSD
+KERNEL NFSD, SUNRPC, AND LOCKD SERVERS
 P:	J. Bruce Fields
 M:	bfields@fieldses.org
 P:	Neil Brown
@@ -3036,7 +3036,7 @@ M:	ja@ssi.bg
 L:	netdev@vger.kernel.org
 S:	Maintained
 
-NFS CLIENT
+NFS, SUNRPC, AND LOCKD CLIENTS
 P:	Trond Myklebust
 M:	Trond.Myklebust@netapp.com
 L:	linux-nfs@vger.kernel.org