Fix mullvad-cli panicking if writing to a closed pipe

[MarkusPettersson98]

This PR fixes #7689. I've provided sources to the problem and suggested solution as comments in the code. Please have a look.

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This change is 

[dlon]

Reviewed 4 of 4 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved

[dlon]

Reviewable status: complete! all files reviewed, all discussions resolved

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mullvad-cli/src/main.rs line 159 at r1 (raw file):

    // https://github.com/rust-lang/rust/issues/119980
    // https://github.com/typst/typst/pull/5444
    sigpipe::reset();

I would slightly prefer using libc over another dependency here.

[MarkusPettersson98]

Reviewable status: 1 of 4 files reviewed, all discussions resolved (waiting on @dlon)

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mullvad-cli/src/main.rs line 159 at r1 (raw file):

Previously, dlon (David Lönnhager) wrote…

I would slightly prefer using libc over another dependency here.

Done WDYT?

[dlon]

Reviewed 3 of 3 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved

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mullvad-cli/src/main.rs line 159 at r1 (raw file):

Previously, MarkusPettersson98 (Markus Pettersson) wrote…

Done WDYT?

[dlon]

Reviewed 1 of 1 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved