Merge pull request #204 from ivmarkov/fix-clippy-errs #477

Job	Run time
build_and_test (rustcrypto)	4m 34s
build_and_test (rustcrypto, alloc)	4m 45s
build_and_test (rustcrypto, os)	6m 20s
build_and_test (mbedtls)	4m 37s
build_and_test (mbedtls, alloc)	4m 47s
build_and_test (mbedtls, os)	6m 55s
build_and_test (openssl)	4m 43s
build_and_test (openssl, alloc)	4m 25s
build_and_test (openssl, os)	6m 24s
	47m 30s

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