Use std::string for CommandContainer text instead of giant static buffer

Use move semantics for CommandContainer instance where feasible

src/network/network_client.cpp

@@ -955,7 +955,7 @@ NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_COMMAND(Packet
 		return NETWORK_RECV_STATUS_MALFORMED_PACKET;
 	}
 
-	this->incoming_queue.Append(&cp);
+	this->incoming_queue.Append(std::move(cp));
 
 	return NETWORK_RECV_STATUS_OKAY;
 }