Add a "protocol: udp/tcp" line so that gssd can use the same protocol for

null calls that was specified in the mount options.

net/sunrpc/rpc_pipe.c

@@ -273,6 +273,8 @@ rpc_show_info(struct seq_file *m, void *v)
 			clnt->cl_prog, clnt->cl_vers);
 	seq_printf(m, "address: %u.%u.%u.%u\n",
 			NIPQUAD(clnt->cl_xprt->addr.sin_addr.s_addr));
+	seq_printf(m, "protocol: %s\n",
+			clnt->cl_xprt->prot == IPPROTO_UDP ? "udp" : "tcp");
 	return 0;
 }