InGame update messages include a timestamp which is passed to the ClientRead methods

Now only used in character position syncing, but some other entities may also have an use for it (e.g. discarding outdated data)

Subsurface/Source/Networking/EntitySpawner.cs

@@ -145,7 +145,7 @@ namespace Barotrauma
             }
         }
 
-        public void ClientRead(Lidgren.Network.NetIncomingMessage message)
+        public void ClientRead(Lidgren.Network.NetIncomingMessage message, float sendingTime)
         {
             if (GameMain.Server != null) return;