Replace Unix SocketAddr with std version #478

Job	Run time
CheckTargets	49s
Clippy	8s
Check (aarch64-apple-ios)	32s
Docs	6s
Check (aarch64-apple-tvos)	31s
MinimalVersions (ubuntu-latest)	18s
Check (aarch64-unknown-openbsd)	31s
MinimalVersions (macos-latest)	25s
MSRV (ubuntu-latest)	13s
Check (arm64_32-apple-watchos)	33s
Nightly	19s
MinimalVersions (windows-latest)	48s
MSRV (macos-latest)	16s
Check (armv7-sony-vita-newlibeabihf)	30s
MSRV (windows-latest)	26s
Check (sparcv9-sun-solaris)	30s
Rustfmt	4s
Sanitizer (address)	43s
Check (x86_64-pc-solaris)	31s
Sanitizer (leak)	39s
Test (ubuntu-latest)	41s
Check (x86_64-unknown-dragonfly)	33s
TestPoll	28s
Test (macos-latest)	42s
Sanitizer (memory)	1m 5s
Check (x86_64-unknown-openbsd)	29s
Test (windows-latest)	2m 22s
Sanitizer (thread)	44s
TestWakerPipe	33s
Passed	0s
	16m 29s

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