fix fromsocket to deal with ipv6 socket

[leommxj]

For AF_INET6 address family, getpeername will return a four-tuple, and throw exception. we only need the first two.

[peace-maker]

Good catch, can you add this under a new 4.13.2 section in the CHANGELOG please?
Bonus points for tests for the fromsocket function! 😏

[leommxj]

try to use Cloudflare's DNS server to test fromsocket, but looks like github action runner are not necessarily have ipv6 address

[peace-maker]

Thank you, we can try some local IP if ipv6 is enabled at all on the runners