DOSBox-X: licence and source

Airtime runs in DOSBox-X, which is free software under the GNU General Public
License version 2 (COPYING, beside this file). The game itself is a separate
program that DOSBox-X runs; it is not covered by that licence.

This package's DOSBox-X: DOSBox-X 2026.10.01 with four Fury fixes to dynamic_x86 and DOS, built for Linux.

Its complete source:
  https://github.com/maitchison/dosbox-x/tree/fury-2026.10.01-fury1
  and the file dosbox-x-2026.10.01-fury1.tar.gz (sha256 f5ce0511072a06fb9359c100b6791a48b983dd2173b5431e4c2fa3c1a7913107)
  on each Airtime release that carries this DOSBox-X: https://github.com/maitchison/airtime-releases/releases
