Fix ipv6 in is_local_domain

[catsout]

As socket.gethostbyname is not support ipv6, use socket.getaddrinfo instead.
Also skip local check for ipv6 and return false for few people use private ipv6.May be a prefix compare is better.
The port param in socket.getaddrinfo is not matter.

[iwalton3]

This doesn't seem to be valid. I don't get an IP address when I run the changed code in the repl:

>>> addr_info = socket.getaddrinfo("google.com",8096)
>>> addr_info[0] == socket.AddressFamily.AF_INET6
False
>>> addr_info[4][0] # ip is set to this
<AddressFamily.AF_INET6: 10>

The ipaddress module supports checking if an ipv6 address is local, so the ip address could be requested from getaddrinfo and checked normally. Simply returning false would cause the player to limit local ipv6 playback to 10 mbps by default.

[catsout]

Sorry, I forgot to add [0] for getaddrinfo. I didn't find it as jellyfin-mpv-shim run ok.