Replace Unix SocketAddr with std version #484

Job	Run time
CheckTargets	1m 20s
Docs	30s
Check (aarch64-apple-ios)	32s
Clippy	7s
Check (aarch64-apple-tvos)	31s
MinimalVersions (ubuntu-latest)	21s
MSRV (ubuntu-latest)	10s
Check (aarch64-unknown-openbsd)	33s
MinimalVersions (macos-latest)	25s
MSRV (macos-latest)	18s
Nightly	21s
MinimalVersions (windows-latest)	47s
Check (arm64_32-apple-watchos)	33s
MSRV (windows-latest)	27s
Check (armv7-sony-vita-newlibeabihf)	34s
Rustfmt	8s
Sanitizer (address)	44s
Test (ubuntu-latest)	45s
Check (sparcv9-sun-solaris)	28s
Sanitizer (leak)	39s
Check (x86_64-pc-solaris)	35s
Test (macos-latest)	40s
Sanitizer (memory)	1m 4s
Check (x86_64-unknown-dragonfly)	31s
TestPoll	28s
Test (windows-latest)	1m 40s
Sanitizer (thread)	45s
Check (x86_64-unknown-openbsd)	31s
TestWakerPipe	26s
Passed	1s
	16m 54s

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