Replace Unix SocketAddr with std version #376

Job	Run time
Docs	5s
Clippy	8s
CheckTargets	1m 35s
Check (aarch64-apple-ios)	35s
Check (aarch64-apple-tvos)	30s
MinimalVersions (ubuntu-latest)	27s
MSRV (ubuntu-latest)	12s
Nightly	22s
Check (aarch64-unknown-openbsd)	32s
MSRV (macos-latest)	19s
Check (arm64_32-apple-watchos)	36s
MinimalVersions (macos-latest)	29s
MSRV (windows-latest)	43s
Rustfmt	5s
MinimalVersions (windows-latest)	47s
Check (armv7-sony-vita-newlibeabihf)	32s
Check (sparcv9-sun-solaris)	31s
Check (x86_64-pc-solaris)	33s
Sanitizer (address)	1m 3s
Check (x86_64-unknown-dragonfly)	37s
Test (ubuntu-latest)	42s
TestPoll	28s
Check (x86_64-unknown-openbsd)	29s
Sanitizer (leak)	50s
Test (macos-latest)	43s
Sanitizer (memory)	1m 45s
Test (windows-latest)	2m 20s
Sanitizer (thread)	52s
TestWakerPipe	28s
Passed	0s
	19m 18s

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