Change `Ipv6Addr::is_loopback` to include IPv4-mapped loopback addresses#85655

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CDirkx wants to merge 3 commits intorust-lang:masterfrom

CDirkx:is-loopback

Commits on Jun 9, 2021

Change `Ipv6Addr::is_loopback` to include IPv4-mapped loopback addresses
CDirkx
committed
Update documentation regarding IPv4-compatible and IPv4-mapped IPv6 addresses
CDirkx
committed
Make examples for `to_ipv6_compatible`, `to_ipv6_mapped`, `to_ipv4` and `to_ipv4_mapped more readable`
CDirkx
committed