Implement more socket options. #3341

Job	Run time
Check nightly-only targets (nightly)	32s
Check selected Tier 3 platforms (nightly)	6m 57s
Check --no-default-features (nightly)	1m 10s
Check (stable)	6m 25s
Rustfmt	10s
Check (nightly)	6m 15s
Check (1.63)	6m 26s
Test rustix_use_experimental_asm (powerpc64le-linux)	1m 25s
Test use-libc (ubuntu)	1m 3s
Test use-libc (i686-linux)	1m 21s
Test use-libc (aarch64-linux)	1m 25s
Test use-libc (powerpc64le-linux)	1m 14s
Test (ubuntu)	1m 5s
Test use-libc (riscv64-linux)	1m 8s
Test (ubuntu-20.04)	1m 3s
Test use-libc (arm-linux)	1m 4s
Test (i686-linux)	1m 18s
Test (aarch64-linux)	1m 19s
Test (powerpc64le-linux)	1m 13s
Test (riscv64-linux)	1m 20s
Test (s390x-linux)	1m 19s
Test (arm-linux)	1m 21s
Test (ubuntu-stable)	56s
Test (i686-linux-stable)	1m 16s
Test (aarch64-linux-stable)	1m 21s
Test (riscv64-linux-stable)	1m 16s
Test (s390x-linux-stable)	1m 2s
Test (powerpc64le-linux-stable)	1m 20s
Test (arm-linux-stable)	1m 11s
Test (ubuntu-1.63)	1m 19s
Test (i686-linux-1.63)	1m 20s
Test (aarch64-linux-1.63)	1m 21s
Test (riscv64-linux-1.63)	1m 19s
Test (s390x-linux-1.63)	1m 18s
Test (powerpc64le-linux-1.63)	1m 18s
Test (arm-linux-1.63)	1m 19s
Test (macos-latest)	6m 3s
Test (macos-11)	6m 1s
Test (windows)	1m 6s
Test (windows-2019)	1m 8s
	1h 18m 27s

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