Add stratum 1 support. #51

Job	Run time
Audit dependencies	32s
Format	8s
Clippy (x86_64-unknown-linux-gnu, false, true)	46s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-gnu)	59s
Clippy (armv7-unknown-linux-gnueabihf, true, false, -target arm-linux-gnueabihf -mcpu=generic+v7a...	24s
Build and test (beta, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 30s
Smoke-test fuzzing targets	5m 0s
Validate man pages	9s
Clippy (x86_64-unknown-linux-musl, true, false, -target x86_64-linux-musl)	45s
Build and test (1.66.0, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 36s
Smoke-test fuzzing targets (--features ntpv5)	3m 15s
Clippy (x86_64-apple-darwin, true, false, -target x86_64-macos-gnu -g)	28s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-musl)	1m 52s
Check unused dependencies	56s
Build and test (stable, macos-latest, x86_64-apple-darwin)	2m 5s
Validate configs	1m 1s
Build and test (stable, ubuntu-latest, --features ntpv5, x86_64-unknown-linux-gnu)	1m 54s
Build and test (1.66.0, ubuntu-latest, --features ntpv5, x86_64-unknown-linux-gnu)	1m 18s
Build and test (stable, ubuntu-latest, --features ntpv5, x86_64-unknown-linux-musl)	1m 1s
Build and test (stable, macos-latest, --features ntpv5, x86_64-apple-darwin)	1m 26s
	27m 5s

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