knfsd: change mailing list for nfsd in MAINTAINERS

nfs@lists.sourceforge.net is being decommissioned.

Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>

MAINTAINERS

@@ -2247,7 +2247,7 @@ P:	J. Bruce Fields
 M:	bfields@fieldses.org
 P:	Neil Brown
 M:	neilb@suse.de
-L:	nfs@lists.sourceforge.net
+L:	linux-nfs@vger.kernel.org
 W:	http://nfs.sourceforge.net/
 S:	Supported