Freeciv

I've not yet managed to get conclusive results from autogame testing. It might (I really need more data to say it for sure) be that like "Coast" units (Bug #682452), those Fighters are never leaving the city they are built at (never attack anybody). So they would only eat up AI resources without providing anything in return.

One more stupidity worth fixing before we let the birds out is that rebasing does not consider the unit's health. I've observed a unit that was stuck at low hp for dozens of turns due to bunny hopping between cities. Likely, we should allow rebasing (if the unit has not full hp, has not moved and is on a refuel point) only if in one turn spent there it would get more hp then in two turns here, or something.

Seems like we have fixed the things that turned fighters for AI into waste. AI seems to use fighters sanely if I provide them to it in editor (rarely builds them itself even if I remove the prohibitions but it's another question maybe solvable by ruleset fiddling). Now, can we remove the code that prevents AI from building them? (Probably we should though retain the lines that prevent considering fuel=1 non-missile units as paratroopers since I doubt AI will return them in time.)

Is the patch here up to date, or should I wait for a new version before starting testing it?

Nope, it's just a draft of what is done or to be done with other patches. I'll try to publish the actual one later today. Idk if the "Revert*" patches are up to date. I say, we likely need to keep it yet for paratroopers.

3.1 version applies to master too, but neither 3.1 nor 2.6 version applies to S3_0.

Pushed to master, S3_1, and S3_0. Waiting for the 2.6.5 release before pushing to S2_6.