All files in this repository are free software, you can redistribute
them and/or modify them under the terms of the GNU General Public 
License as published by  the Free Software Foundation; either 
version 2 of the License, or (at your option) any later version.
The license in full can be read in the file "gpl-2.0.txt" which 
always should accompany this file. 

Note that a running server is NOT considered a "derivate works". I.e.
this license only applies to the files in their source form. If you
alter them in any way and populate a server with them, you are not
obligated to release them to anyone accessing that server.
This is important, because you often want game rules hidden to the user.
There might be puzzles, or hidden areas, or secret recipes that you don't
want the user to see immediately.