user name as part of the multicast packet message

examples/src/UdpMulticastHttpExamples/MulticastSender.java

@@ -6,6 +6,8 @@ import java.net.*;
 /**
  * Looks a lot like UdpSender.  Start this after launching MulticastReceiver.
  * 
+ * Privacy note: this sender advertises your user name as part of the multicast packet message
+ * 
  * @author mcgredo
  * @author brutzman
  */
@@ -52,6 +54,7 @@ public class MulticastSender {
 				if (index < loopSize - 1)
 				{
 				// Put together an updated packet to send
+					 dos.writeChars(System.getProperty("user.name") + ": ");
 					 dos.writeChars("MulticastSender packet " + Integer.toString(index) + ";"); // string chars for readability
 					 dos.writeInt  (index); // arbitrary data, needs Java or byte-alignment to read
 					 dos.writeFloat(17.0f); // arbitrary data, needs Java or byte-alignment to read