v5.2.0
- improved TLS downgrade mechanism for broken servers, support correctly TLS 1.3
- url: update for the latest version of https://url.spec.whatwg.org/
- url: rewritten for better memory management
- libicu is now longer mandatory build dep, but then non-ascii domains aren't supported
- configure: check for ssl funcs only if libssl is present
- configure: better check for libnghttp2