rustup: new, 1.27.1

[500-internal-server-error]

Fixes #16145

[ognevny]

why ucrt64 only?

[500-internal-server-error]

Ah, I forgot to add the other arches - when I write PKGBUILDs for myself, I usually only specify ucrt since that's the only one I use. I'll add the other ones.

[ognevny]

fix rustup-profile.sh to use ${MINGW_PREFIX}

[filnet]

So the MSYS2 rust is needed to build rustup.
And the 1st thing rustup does it kick out MSYS2 rust.
Not very polite :)

[500-internal-server-error]

:) It builds too if an existing rust install can be found elsewhere (e.g., manual download of rustup-init), with --nodeps, which is how I built this locally initially.

[500-internal-server-error]

Bump :) Is there anything else I need to do?

[ognevny]

why did you reset your commit?

[500-internal-server-error]

Superseded by #20989

Forgot to do the work in a separate branch, updating master on my fork caused merge conflicts :)

[500-internal-server-error]

why did you reset your commit?

I tried to sync my fork with this repo, which failed with a merge conflict. Because I forgot to add my commits to a separate branch, I cannot my fork's master with this repo's master without rewriting history.