in pkgsrc yet.
Upstream ChangeLog is at http://freeciv.wikia.com/wiki/NEWS-2.5.0,
excerpt:
What's changed since 2.4
The main changes in Freeciv 2.5 are the inclusion of the 'civ2civ3'
ruleset, a new Qt client, and much more flexibility for those
creating their own rulesets. The AI has also had some improvements.
As is usual for major releases, 2.5 clients cannot interoperate with
pre-2.5 servers, and vice versa. Pre-2.5 savegames can however be
loaded into 2.5, and in most cases, the supplied rulesets have not
changed so much as to make it difficult to complete a game started
with 2.4.x's rules.
