NFSd: call svc rpcbind cleanup explicitly

We have to call svc_rpcb_cleanup() explicitly from nfsd_last_thread() since
this function is registered as service shutdown callback and thus nobody else
will done it for us.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfsd/nfssvc.c

@@ -256,6 +256,8 @@ static void nfsd_last_thread(struct svc_serv *serv)
 	nfsd_serv = NULL;
 	nfsd_shutdown();
 
+	svc_rpcb_cleanup(serv);
+
 	printk(KERN_WARNING "nfsd: last server has exited, flushing export "
 			    "cache\n");
 	nfsd_export_flush();