Add port as for simple-netty-server
diff --git a/apps/foo/src/main/java/org/onlab/onos/foo/SimpleNettyServer.java b/apps/foo/src/main/java/org/onlab/onos/foo/SimpleNettyServer.java
index 5578fcd..47b05cd 100644
--- a/apps/foo/src/main/java/org/onlab/onos/foo/SimpleNettyServer.java
+++ b/apps/foo/src/main/java/org/onlab/onos/foo/SimpleNettyServer.java
@@ -18,7 +18,8 @@
             }
 
         public static void startStandalone(String[] args) throws Exception {
-            NettyMessagingService server = new NettyMessagingService(8081);
+            int port = args.length > 0 ? Integer.parseInt(args[0]) : 8081;
+            NettyMessagingService server = new NettyMessagingService(port);
             server.activate();
             server.registerHandler("simple", new NettyLoggingHandler());
             server.registerHandler("echo", new NettyEchoHandler());