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

modules/gamelib/const.lua

@@ -172,7 +172,7 @@ CIPSOFT_RSA = "1321277432058722840622950990822933849527763264961655079678763618"
               "88792221429527047321331896351555606801473202394175817"
 
 -- set to the latest Tibia.pic signature to make otclient compatible with official tibia
-PIC_SIGNATURE = 0x50a6469d
+PIC_SIGNATURE = 0x52131b61
 
 OsTypes = {
   Linux = 1,

modules/gamelib/game.lua

@@ -52,7 +52,7 @@ function g_game.getSupportedClients()
     854, 860, 861, 862, 870, 910, 940, 
     944, 953, 954, 960, 961, 963, 970,
     980, 981, 982, 983, 984, 985, 986, 
-    1001, 1002, 1010
+    1001, 1002, 1010, 1020, 1021, 1022,
   }
 end
 

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()

src/framework/net/connection.cpp

@@ -126,7 +126,7 @@ void Connection::write(uint8* buffer, size_t size)
             m_outputStream = std::shared_ptr<asio::streambuf>(new asio::streambuf);
 
         m_delayedWriteTimer.cancel();
-        m_delayedWriteTimer.expires_from_now(boost::posix_time::milliseconds(10));
+        m_delayedWriteTimer.expires_from_now(boost::posix_time::milliseconds(0));
         m_delayedWriteTimer.async_wait(std::bind(&Connection::onCanWrite, asConnection(), std::placeholders::_1));
     }