bket 483b47a947 Update to freeciv-2.6.4 ...

Bugfix release in the stable 2.6 series. Changes:
- https://freeciv.fandom.com/wiki/NEWS-2.6.3
- https://freeciv.fandom.com/wiki/NEWS-2.6.4

While here enable backtrace support. Latter is from Brad Smith, update
is from me.

2021-06-12 06:58:01 +00:00

..

pkg

Update to freeciv-2.6.4

2021-06-12 06:58:01 +00:00

distinfo

Update to freeciv-2.6.4

2021-06-12 06:58:01 +00:00

Makefile

Update to freeciv-2.6.4

2021-06-12 06:58:01 +00:00