Do not call addrinfo on local transport adresses, if returning a
server handle (for reuse or whatever). We just return now a handle
connected to the local rpcbind.

Do not try to call checkcache, if host = NULL;

For the local transport, fill in the adress of rpcbind.

--- lib/libc/rpc/rpcb_clnt.c	Mon Apr  2 23:41:43 2001
+++ lib/libc/rpc/rpcb_clnt.c	Sat Apr 21 12:54:25 2001
@@ -300,7 +300,9 @@
 	/* Get the address of the rpcbind.  Check cache first */
 	addr_to_delete.len = 0;
 	rwlock_rdlock(&rpcbaddr_cache_lock);
-	ad_cache = check_cache(host, nconf->nc_netid);
+	ad_cache = NULL;
+	if (host != NULL)
+		ad_cache = check_cache(host, nconf->nc_netid);
 	if (ad_cache != NULL) {
 		addr = ad_cache->ac_taddr;
 		client = clnt_tli_create(RPC_ANYFD, nconf, addr,
@@ -345,9 +347,26 @@
 	    nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
 #endif
 
-	if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
-		rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
-		return NULL;
+	if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
+		client = local_rpcb();
+		if (! client) {
+#ifdef ND_DEBUG
+			clnt_pcreateerror("rpcbind clnt interface");
+#endif
+			return (NULL);
+		} else {
+			struct sockaddr_un sun;
+
+			*targaddr = malloc(sizeof(sun.sun_path));
+			strncpy(*targaddr, _PATH_RPCBINDSOCK,
+			    sizeof(sun.sun_path));
+			return (client);
+		}
+	} else {
+		if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
+			rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
+			return NULL;
+		}
 	}
 
 	for (tres = res; tres != NULL; tres = tres->ai_next) {
@@ -392,7 +411,8 @@
 			break;
 		}
 	}
-	freeaddrinfo(res);
+	if (res)
+		freeaddrinfo(res);
 	return (client);
 }