Update GlobalChat.py

https://github.com/cyberkitsune/PSO2Proxy/issues/126
What do the # and & prefixes in channel names mean?

They exist so that channel names will be distinguished from user nicknames. If the server is not connected to an IRC network, it does not matter which prefix — # or & — it has been created with. However, if the server is connected to another server (i.e. an IRC network), only # channels will work globally, across the network; & channels will be local and work only on the local server.