Bug#700222: freeciv-server: irrigation of swamps broken

[Jacob Nevins]

I wrote:
> 2.2.1 is rather old, but I don't recall any progress-losing bugs fixed
> since then, offhand.

...and then linked to gna #15510, which itself links to exactly such a
progress-losing bug that is present in 2.2.1 and fixed in 2.2.2 (that I
had introduced and fixed myself and subsequently forgotten about).

<http://gna.org/bugs/?16209>: all progress on projects is lost when
loading a savegame into 2.2.1.

So, was there one or more save/load cycles between these two turns?

If this is the case, then you'll see a different situation to me when
you load those savegames. The bug is that progress is lost on load, so
loading into a newer version of Freeciv, progress is not lost. I loaded
into 2.2.7, as the 2.2.x version I had to hand. So I predict that when
you load these savegames into 2.2.1, you're seeing the full 15 turns
left in both cases. Is that correct?

If this is the explanation, then it's fixed upstream and indeed in newer
Debian versions. It's a bit unfortunate that the current Debian stable
(soon to be oldstable?) is stuck with this buggy version; not sure
what's to be done.