Use pure rust libraries to get host interfaces

[tcharding]

For the sake of not having to compile any C code, let's try use only pure Rust dependencies. To get the host interface information we can use the pnet and ipnetwork libraries. These are both pure Rust.

pnet v0.25 depends on ipnetwork v0.15 so we use that also instead of the latest ipnetwork v0.16.

Resolves: #1489

[tomaka]

Thanks. The PR in itself has my green mark, but I'm not super confident about pnet.
It's quite a huge beast for "just" getting the interface addresses, and this section suggests that building libp2p (and anything that depends on it) for Windows would become extremely painful.

[tcharding]

Thanks. The PR in itself has my green mark, but I'm not super confident about pnet.
It's quite a huge beast for "just" getting the interface addresses, and this section suggests that building libp2p (and anything that depends on it) for Windows would become extremely painful.

Thanks for the review, I was a bit unsure at the choice of libraries in this PR also. I wanted to put up a PR to start the conversation to demonstrate some effort instead of just talking. I'm more than happy to redo it with other libraries if you (or anyone) can suggest a better alternative. Was fun to write this anyways.

[tcharding]

Not really sure what to do about this right now, closing it so as to not clutter the place up with stale open PRs.