Added trigger reference to WaypointData, unused

WaypointData also inherits from Entity now, so I could alias Entity's API
for it too. I've also made a number of comment tweaks.

common/network/udp_network_utility.cpp

@@ -26,7 +26,7 @@
 
 #include <stdexcept>
 
-//NOTE: memset() is used before sending a packet to remove old data; you don't want to send sensitive data over the network
+//DOCS: memset() is used before sending a packet to remove old data; you don't want to send sensitive data over the network
 //NOTE: don't confuse SerialPacketBase with UDPpacket
 
 void UDPNetworkUtility::Open(int port) {