add lcemp networking + ps3 support

YES I KNOW ITS GARBAGE, THATS WHY ITS NOT ON MAIN

ILL FIX IT UP IN FUTURE COMMITS THEN MERGE TO MAIN

Minecraft.Client/PendingConnection.cpp

@@ -157,6 +157,7 @@ void PendingConnection::handleLogin(shared_ptr<LoginPacket> packet)
 
 	//if (true)// 4J removed !server->onlineMode)
 	bool sentDisconnect = false;
+	bool nameTaken = false;
 
 	if( sentDisconnect )
 	{
@@ -168,7 +169,29 @@ void PendingConnection::handleLogin(shared_ptr<LoginPacket> packet)
 	}
 	else
 	{
-		handleAcceptedLogin(packet);
+		vector<shared_ptr<ServerPlayer> > &pl = server->getPlayers()->players;
+
+		for (unsigned int i = 0; i < pl.size(); i++)
+		{
+			if (pl[i] != NULL && pl[i]->name == name)
+			{
+				nameTaken = true;
+				break;
+			}
+		}
+
+		if (nameTaken)
+		{
+			app.DebugPrintf("Rejecting duplicate name: %ls\n", name.c_str());
+
+			// to do: replace this with a dedicated duplicate name
+			// message
+			disconnect(DisconnectPacket::eDisconnect_Banned);
+		}
+		else
+		{
+			handleAcceptedLogin(packet);
+		}
 	}
 	//else
 	{