Rust

Merge pull request #3366 from cgwalters/unconditional-cfs #2382

Job	Run time
build	2m 5s
build-git-libostree	3m 3s
Build, minimum supported toolchain (MSRV)	1m 36s
build-no-features	1m 26s
cargo-deny	23s
	8m 33s

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