various improvements #5492

Job	Run time
pure-rust-build	1m 59s
test-fast (windows-latest)	12m 55s
test-fast (macos-latest)	3m 5s
cargo-deny	26s
test-fast (ubuntu-latest)	3m 43s
cargo-deny-advisories	27s
check-packetline (ubuntu-latest)	5s
lint	3m 55s
check-blocking	7s
test	10m 39s
test-32bit	5m 40s
test-32bit-cross (armv7-linux-androideabi)	1m 7s
test-fixtures-windows	15m 7s
test-journey	3m 45s
WebAssembly (wasm32-unknown-unknown)	1m 8s
WebAssembly (wasm32-wasip1)	46s
Tests pass	1s
	1h 4m 55s

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