-configurable environment variables for when the game is launched
-configurable rcfilefmt and default rcfile name
-configurable stuff: max user name len, allowed chars in usernames,
 allow mailing, allow char stripping, ...
-allow different banners for different games

- Flags for operators/staff/admins or (optionally) user-bans.

- Localization of variables, code clean up

- Use /var/run/nologin and/or dgl-specific nologin file

- Honor window size changes (currently the player has to relogin if window
  size changes)

- A way (config file or compile time) to disable things like registration or
  mail