Rust

Merge pull request #1390 from coreos/dependabot/cargo/h2-0.3.24 #2448

Job	Run time
Docs	1m 46s
Lints, pinned toolchain (x86_64)	1m 30s
Tests, minimum supported toolchain (x86_64)	2m 30s
Lints, pinned toolchain (s390x)	10m 6s
Tests, minimum supported toolchain (s390x)	16m 9s
Tests, unstable toolchain (beta, x86_64)	2m 39s
Tests, stable toolchain (x86_64)	2m 27s
Tests, unstable toolchain (nightly, x86_64)	3m 15s
Tests, stable toolchain (s390x)	14m 47s
	55m 9s

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