Support for net interfaces on FreeBSD and macOS

[tredoe]

I've found some information of low level related to net interfaces, for if somebody with knowledge of low level would want to add it.

• https://kbyanc.blogspot.com/2010/11/python-enumerating-ip-addresses-on.html
• https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man3/getifaddrs.3.html
• https://nxmnpg.lemoda.net/3/getifaddrs
• https://www.lemoda.net/freebsd/net-interfaces/index.html