various improvements #5574

Job	Run time
cargo-deny	29s
cargo-deny-advisories	29s
check-blocking	5s
check-packetline (ubuntu-latest)	6s
lint	3m 44s
pure-rust-build	1m 56s
test	15m 13s
test-32bit (i386)	10m 46s
test-32bit (arm32v7)	7m 31s
test-fast (windows-latest)	20m 28s
test-fast (macos-latest)	6m 28s
test-fixtures-windows	19m 33s
test-fast (ubuntu-latest)	6m 32s
test-fast (ubuntu-22.04-arm)	6m 11s
test-journey	6m 30s
WebAssembly (wasm32-unknown-unknown)	1m 25s
WebAssembly (wasm32-wasip1)	1m 26s
Tests pass	1s
	1h 48m 53s

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