0.4.30

Fixed

• Fix a safety hole in Multi::close and hide it from docs. This method previously would free the underlying CURLM pointer without consuming the Multi struct, making it possible to cause a use-after-free in safe code. This function now simply returns Ok(()) in order to maintain backwards compatibility, but will be either changed or removed in a future breaking release. (#340, #342)

Added

• Add bindings for setting SSL/TLS options for proxies: proxy_cainfo, proxy_sslcert, and proxy_sslkey. (#339)
• Add HttpVersion::V3 to accomodate for future HTTP/3 support. (#331)

Changed

• Mitigate a race condition that can occur when libcurl is first initialized with certain TLS engine versions on a thread other than the main thread by attempting to initialize in a constructor function automatically. This should reduce the likelihood of the misuse occurring on most targets. (#333, #334)