* MDF [mqtt/protocol/transport] use new nng api to eliminate warnings

Signed-off-by: Jaylin <jaylin@emqx.io>

Author: JaylinYu

src/nng.c

@@ -2424,12 +2424,6 @@ nng_msg_set_cmd_type(nng_msg *m, uint8_t cmd)
 	nni_msg_set_cmd_type(m, cmd);
 }
 
-uint8_t
-nng_msg_get_cmd_type(nng_msg *m)
-{
-	return nni_msg_get_cmd_type(m);
-}
-
 const char *
 conn_param_get_clientid(conn_param *cparam)
 {

src/sp/protocol/mqtt/nmq_mqtt.c

@@ -212,7 +212,6 @@ nano_pipe_timer_cb(void *arg)
 				nni_qos_db_remove_unused_msg(
 				    is_sqlite, old->nano_qos_db);
 #endif
-				log_error("remove pipe %ld", p->pipe->p_id);
 				nni_id_remove(
 				    &s->cached_sessions, p->pipe->p_id);
 			}

src/sp/transport/mqtt/broker_tcp.c

@@ -192,7 +192,7 @@ tcptran_pipe_init(void *arg, nni_pipe *npipe)
 
 	nni_pipe_set_conn_param(npipe, p->tcp_cparam);
 	cid = (char *) conn_param_get_clientid(p->tcp_cparam);
-	clientid_key = DJBHashn(cid, strlen(cid));
+	clientid_key = DJBHashn(cid, conn_param_get_clientid_len(p->tcp_cparam));
 	rv = nni_pipe_set_pid(npipe, clientid_key);
 	log_debug("change p_id by hashing %d rv %d", clientid_key, rv);
 	p->npipe    = npipe;

src/sp/transport/mqtts/broker_tls.c

@@ -195,7 +195,7 @@ tlstran_pipe_init(void *arg, nni_pipe *npipe)
 
 	nni_pipe_set_conn_param(npipe, p->tcp_cparam);
 	cid = (char *) conn_param_get_clientid(p->tcp_cparam);
-	clientid_key = DJBHashn(cid, strlen(cid));
+	clientid_key = DJBHashn(cid, conn_param_get_clientid_len(p->tcp_cparam));
 	rv = nni_pipe_set_pid(npipe, clientid_key);
 	log_debug("change p_id by hashing %d rv %d", clientid_key, rv);
 	p->npipe = npipe;

src/sp/transport/mqttws/nmq_websocket.c

@@ -1168,7 +1168,7 @@ wstran_pipe_init(void *arg, nni_pipe *pipe)
 	char    *cid;
 	uint32_t clientid_key = 0;
 	cid = (char *) conn_param_get_clientid(p->ws_param);
-	clientid_key = DJBHashn(cid, strlen(cid));
+	clientid_key = DJBHashn(cid, conn_param_get_clientid_len(p->ws_param));
 	id = nni_pipe_id(pipe);
 	rv = nni_pipe_set_pid(pipe, clientid_key);
 	log_debug("change p_id by hashing from %d to %d rv %d",