This update for freeciv fixes the following issues:

- update to 3.0.3 (boo#1202548, CVE-2022-6083):

  * 3.0.3 is a bugfix release
  * see https://freeciv.fandom.com/wiki/NEWS-3.0.3 

- update to 3.0.2:

  * 3.0.2 is a generic bugfix release
  * see https://freeciv.fandom.com/wiki/NEWS-3.0.2 

- update to 3.0.1:

  * 3.0.1 is a generic bugfix release
  * see https://freeciv.fandom.com/wiki/NEWS-3.0.1 

- update to 3.0.0:

  * This release is a major upgrade which with some changes that
    can support backward compatible rulesets
  * see https://freeciv.fandom.com/wiki/NEWS-3.0.0#WHAT.27S_CHANGED_SINCE_2.6

- update to 2.6.6:

  * https://freeciv.fandom.com/wiki/NEWS-2.6.5
  * 2.6.6 is a bugfix release.