various improvements #5531

Job	Run time
cargo-deny-advisories	27s
check-blocking	24s
check-packetline (ubuntu-latest)	6s
cargo-deny	36s
lint	3m 58s
pure-rust-build	2m 9s
test	10m 33s
test-32bit (i386)	5m 58s
test-32bit (arm32v7)	4m 17s
test-fast (windows-latest)	15m 54s
test-fast-arm	4m 12s
test-fixtures-windows	15m 12s
test-fast (macos-latest)	3m 49s
test-fast (ubuntu-latest)	3m 38s
test-journey	3m 49s
WebAssembly (wasm32-unknown-unknown)	1m 20s
WebAssembly (wasm32-wasip1)	43s
Tests pass	1s
	1h 17m 6s

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