Replace Unix SocketAddr with std version #378

Job	Run time
CheckTargets	1m 20s
Docs	16s
Check (aarch64-apple-ios)	30s
Check (aarch64-apple-tvos)	32s
Clippy	21s
Check (aarch64-unknown-openbsd)	33s
MinimalVersions (ubuntu-latest)	22s
Check (arm64_32-apple-watchos)	29s
MinimalVersions (macos-latest)	2m 9s
MinimalVersions (windows-latest)	40s
Check (armv7-sony-vita-newlibeabihf)	30s
MSRV (ubuntu-latest)	14s
Nightly	22s
Check (sparcv9-sun-solaris)	28s
MSRV (macos-latest)	21s
Check (x86_64-pc-solaris)	30s
MSRV (windows-latest)	33s
Check (x86_64-unknown-dragonfly)	32s
Rustfmt	7s
Check (x86_64-unknown-openbsd)	36s
Sanitizer (address)	1m 1s
Sanitizer (leak)	52s
Test (ubuntu-latest)	51s
TestPoll	33s
TestWakerPipe	34s
Test (macos-latest)	1m 4s
Test (windows-latest)	2m 19s
Sanitizer (memory)	1m 43s
Sanitizer (thread)	53s
Passed	1s
	21m 16s

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