Room Sorted List (0x2100): Pagination is broken

[jglim]

gunbound-server/GunBoundServer/gameserver.py

Line 936 in 46af0e7

elif client_command == 0x2100:

When the game client requests for the room sorted list, an page offset will be provided. The server manages the pagination, and should respond with up to 6 room entries.

This doesn't appear to be a major issue when testing since the room list almost never exceeds 6, though it will be an issue if it is used as an actual public-facing server.