feat: support {Free|Net|Open}BSD #8418

Job	Run time
Checking fmt	9s
Checking docs	1m 53s
cargo deny	30s
check_semver	5m 13s
clippy_check	2m 31s
Cross Test (i686-unknown-linux-gnu)	2m 31s
Cross Build Only (armv7-linux-androideabi)	1m 0s
Minimal Supported Rust Version	2m 10s
Cross Build Only (aarch64-linux-android)	1m 1s
Run network simulations/benchmarks	8m 19s
Cross Build Only (x86_64-unknown-freebsd)	1m 5s
Build wasm32	27s
Cross Build Only (x86_64-unknown-netbsd)	1m 8s
CI Test Suite / Tests (ubuntu-latest, stable, all)	2m 26s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	3m 52s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	3m 51s
CI Test Suite / Tests (ubuntu-latest, stable, none)	3m 29s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	3m 46s
CI Test Suite / Tests (ubuntu-latest, stable, default)	2m 19s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	3m 28s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	2m 51s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	3m 4s
	57m 3s

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