Partial support for protocol 1020 and minimize lag

I am able to login in global Tibia however there are game protocol errors
* there is a new opcode 167, which I dont know what it is
* there are changes in opcode 147 which handles text messages that I don't know too

Connection writing was optimized, playing "lag" should improve by 10ms,
and improve much more in systems with low fps

src/framework/core/application.cpp

@@ -147,6 +147,11 @@ void Application::poll()
 #endif
 
     g_dispatcher.poll();
+
+    // poll connection again to flush pending write
+#ifdef FW_NET
+    Connection::poll();
+#endif
 }
 
 void Application::exit()