Bug#769906: freeciv: supporting xz compression

[Markus Koschany]

Package: src:freeciv
Version: 2.4.3-3
Severity: wishlist

A reminder for the next major release of Freeciv, 2.5.

It would be a good idea if we supported xz compression for savegames, rulesets and other
files since xz has the best compression ratio of all algorithms. For all other reasons
gzip is still an excellent choice.

To make this change happen we have to add liblzma-dev to
Build-Depends.

Markus