Touching .po files (#45535)

There's currently a patch for
https://osdn.net/projects/freeciv/ticket/45535 in review, for
S3_0/S3_1/master. That patch is going to touch core translation domain
.po files directly. It's about fixing a typo in the English original
string. In this case it's better to update related msgid in the .po
files directly, so no translation gets turned to fuzzy status
(certainly nobody needs to update their translation just because the
typo fix in the original)

The patch is likely to get pushed in two or three days. If you are
working with an older copy of the .po file over that moment, you may
want to do some extra checking that you don't revert this msgid change
when you provide your translation updates, nor that you get fuzzy just
because YOUR msgid does not match the original (corrected) string in
the source code.


 - ML