optimizing network stuff

Runtime/Engine/Code/RConsts.cs

@@ -21,6 +21,7 @@
         internal const string k_BuildFlagDebug = "RR_DEBUG";
         internal const string k_BuildFlagSteam = "RR_STEAM";
 
-        internal const int k_NetworkPacketMagicNumber = 0x52455245; // "RERE" in ASCII
+        internal const ushort k_NetworkMessageMagic = 0xBEBE;
+        internal const int k_NetworkMessageMaxSize = 1024;
     }
 }