• lib: Implement RFC 8441 :protocol support (GH-1181)
• nghttpx: Add read/write-timeout parameters to backend option (GH-1235)
• nghttpx: Fix mruby parameter validation in backend option
• nghttpx: Implement RFC 8441 Bootstrapping WebSocket with HTTP/2 (GH-1234)
• nghttpx: Update neverbleed to fix OpenSSL 1.1.1 issues
• nghttpx: Update mruby 1.4.1
• nghttpx: Add mruby env.tls_handshake_finished
• nghttpx: Add --tls13-ciphers and --tls-client-ciphers options
• nghttpx: Add RFC 8470 Early-Data header field support
• nghttpx: Add RFC 8446 TLSv1.3 0-RTT early data support (GH-846)