Windows translation bundling alternative

[kmilos]

Addresses #9433 in a somewhat different way: bundles only the explicitly required translation catalogs for any locale available, thus reducing the installer size (this is the case already for macOS).

Also switch to canonical "iso_639-2" for all installers.

[TurboGit]

I'll let @wpferguson approve this, too much Windows oriented for my skills.

[parafin]

Out of the interest - what is the difference between iso_639 and iso_639-2?

[kmilos]

No difference, just that "iso_639" is obsoleted and is currently a symlink/copy to support legacy apps. I don't consider dt to be a legacy app ;)

The gettext domains have been renamed to better match the actual ISO number:

ISO 639-2: Renamed from iso_639 to iso_639-2
ISO 639-3: Renamed from iso_639_3 to iso_639-3
ISO 639-5: Renamed from iso_639_5 to iso_639-5
ISO 3166-1: Renamed from iso_3166 to iso_3166-1
ISO 3166-2: Renamed from iso_3166_2 to iso_3166-2

All previously used gettext domains are linked to the new domain names, so that this transition should be smooth for programs using those domain names.

[TurboGit]

@kmilos : There is conflicts to be resolved here. TIA.

[kmilos]

Done, ready for review @wpferguson @TurboGit

[TurboGit]

Let's move on, this seems ok to me. That's the kind of change that need field testing, so merging now. Thanks.

[kmilos]

Merci

[kmilos]

The installer size went down by 15MB as result, thanks. 😉

[TurboGit]

Well thanks to you for this achievement !