Add support for abstract sockets #693

Job	Run time
windows_gnu (nightly, x86_64-pc-windows-gnu)	1m 22s
msrv (ubuntu-latest, 1.63)	1m 38s
clippy	16s
cross (ubuntu-latest)	1m 42s
msrv (windows-latest, 1.63)	2m 2s
fmt	10s
cross (macos-latest)	46s
security_audit	6s
test (ubuntu-latest, nightly)	45s
test (ubuntu-latest, beta)	40s
test (ubuntu-latest, stable)	35s
test (windows-latest, nightly)	1m 36s
test (windows-latest, beta)	1m 20s
test (windows-latest, stable)	2m 18s
test (macos-latest, nightly)	1m 5s
test (macos-latest, beta)	2m 10s
test (macos-latest, stable)	2m 5s
	20m 36s

Provide feedback