osx: replace getnameinfo with inet_ntop

[correabuscar]

this is like PR #462 for FreeBSD,
and like PR #458 for Linux.

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I can't test the build and run for these, as I've been unable to get macOS in virtualbox (tried 4 iso`s). But I'll look in github actions for the build, and just hope the runs work fine on bare metal.

outdated info

Unsure about those #include`s: is #include <arpa/inet.h> the same as #include <sys/arpa/inet.h> ?
I've got them from:

LEGACY SYNOPSIS
     #include <sys/types.h>
     #include <sys/socket.h>
     #include <sys/netinet/in.h>
     #include <sys/arpa/inet.h>

     These include files are necessary for all functions.

src: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man3/inet_ntop.3.html

PS: Thank you for this learning experience btw :) (with all the PRs, not just this one)

[aristocratos]

Tested to work as expected on macos13, since it compiles fine on macos11 and macos12 I would assume the same is true there.

Great work 👍🏼
Thanks for your contributions!