New server for Chinese players

Version 4.2.3 is online:

• changed the online server code to allow adding/removing servers without having to rebuild both the server and client code. Because of this, everyone has to upgrade to a new protocol to be able to play online.
• added a new server in China East region for players who had problems connecting to Honk Kong server. Depending on usage, the Hong Kong server might get removed in the future

Make sure you update to 4.2.3 or higher if you want to play online games.