merge && test for master

drivers/net/mmnif.c

@@ -1330,7 +1330,7 @@ int mmnif_open()
 	}
 
 	/* set our network interface to the default interface for lwip*/
-//	netif_set_default(mmnif_dev);
+        netif_set_default(mmnif_dev);
 	/* tell lwip all initialization is done and we want to set it ab*/
 	netif_set_up(mmnif_dev);
 

kernel/init.c

@@ -154,8 +154,8 @@ int network_init(void)
 #endif
 
 	// start echo and ping server
-        echo_init();
-        ping_init();
+ //       echo_init();
+ //       ping_init();
 #endif
 
 	return 0;