Rename "sigfault" to "segfault"

[j8r]

"sigfault" doesn't exist: this is either "segfault" for Segmentation fault, or SIGSEGV.

When I was starting to say "sigfault" and realized this word doesn't exist, I knew it was time to change this 😅

Perhaps it is a portmanteau for "Segmentation fault signal"?

[hugopl]

This conflicts with #10463, that remove all these files.

[j8r]

Not really, the renaming isn't done in there.

By the way, it will be better to merge this first, sooner the better, so the segflaut refactor PR (still WIP as writing) can be rebased against master, and be ready for review with this changes in the future.

[asterite]

it will be better to merge this first

Not really. This is a good PR. But the changes aren't visible to anyone not reading the code.

The other PR is visible and useful to anyone compiling the compiler, or any program. So I wouldn't hurry merging this PR when all these changes will be undone by the other PR.

[bcardiff]

FTR, when this is merged distribution-scripts needs to be updated

• https://github.com/crystal-lang/distribution-scripts/blob/79a18aec563a06c49f705f2b15704a767831ef02/linux/Dockerfile#L110
• https://github.com/crystal-lang/distribution-scripts/blob/79a18aec563a06c49f705f2b15704a767831ef02/docker/alpine.Dockerfile#L25-L26

And it's likely that will affect other packages.

[straight-shoota]

Yes, #10463 should be merged first/instead.

[j8r]

Yes, the linked PR now includes the renaming too.

[straight-shoota]

This was resolved by #10463.

Nevertheless thank you, @j8r