Merge pull request #204 from ivmarkov/fix-clippy-errs #829

Job	Run time
build_and_test (rustcrypto)	4m 33s
build_and_test (rustcrypto, alloc)	4m 30s
build_and_test (rustcrypto, os)	6m 25s
build_and_test (mbedtls)	4m 44s
build_and_test (mbedtls, alloc)	4m 39s
build_and_test (mbedtls, os)	6m 41s
build_and_test (openssl)	4m 21s
build_and_test (openssl, alloc)	4m 16s
build_and_test (openssl, os)	6m 24s
	46m 33s

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