De-coupling the IClientAPI interface and ClientManager class from the

libsl/libomv Packet, as other client stacks could use other data types to pass
packets around. Starting with InPacket() here, more to come.

OpenSim/Framework/IClientAPI.cs

@@ -703,7 +703,7 @@ namespace OpenSim.Framework
 
 
         void SetDebug(int newDebug);
-        void InPacket(Packet NewPack);
+        void InPacket(object NewPack);
         void ProcessInPacket(Packet NewPack);
         void Close(bool ShutdownCircuit);
         void Kick(string message);