Move to maintained if-addrs crate

[mon]

Pro: mips should work now
Con: The mips pipeline no longer runs because of rust-lang/compiler-team#648

Not really sure of the best action here...

I'll add the link-local stuff in another PR so there's a clear chain of commits.

[mon]

Thoughts on MIPS solutions:

• just use an older rustc instead of stable
• Wait until this is fixed: Error "cannot find -lunwind" when compiling static mips-unknown-linux-musl  rust-lang/rust#120655 and cross re-enables their MIPS targets, then add -Zbuild-std to the pipeline

Any thoughts? Not in a hurry to merge, I just remember it every now and then 😅

[bltavares]

Hey there! I'm not ignoring this PR, but my MIPS setup is completely broken, and it's been taking a while to update and fix due to upstream lack pre-compiled libstd now.

I really appreciate the update, and as soon as I have more time, and can actually fix my local setup, I'll be landing this change

[mon]

Excellent, thanks! Good luck fixing your local setup, I don't envy you...

[bltavares]

I've been able to validate the changes on Windows amd64, Linux amd64 and Linux MIPS :)

Thanks for the contribution!

[mon]

Excellent news, thanks! How'd you fix your MIPS setup in the end? Just using an older rustc, or did you massage std to compile?