GHSA-4fcv-w3qc-ppgg rust-openssl Use-After-Free in `Md::fetch` and `Cipher::fetch`

• crates.io openssl: >= 0.10.39, < 0.10.72 → fixed in 0.10.72

When a `Some(...)` value was passed to the `properties` argument of either of these functions, a use-after-free would result. In practice this would nearly always result in OpenSSL treating the properties as an empty string (due to `CString::drop`'s behavior). The maintainers thank quitbug for reporting this vulnerability to us.