• lib: Fix nghttp2_session_want_write (GH-832)
• doc: Document pkg-config path usage
• build: Eliminate U macro; Instead use (void)VAR for better compiler compatibility.
• src: BoringSSL supports SSL_CTX_set_{min,max}_proto_version. (Patch from Piotr Sikora) (GH-853)
• src: Use Mozilla's "Modern compatibility" ciphers by default
• src: nghttp2_gzip: fix this statement may fall through [-Werror=implicit-fallthrough=] found by gcc7 (Patch from Alexis La Goutte) (GH-823)
• nghttpx: Print version number with -v option
• nghttpx: Enable X25519 with boringssl
• nghttpx: Retry getaddrinfo without AI_ADDRCONFIG (GH-858)
• nghttpx: Failing to listen on server socket is fatal error
• nghttpx: Escape certain characters in access log (GH-856)
• nghttpx: Ignore further input if connection is going to close
• nghttpx: Don't call functions which are not async-signal-safe after fork but before execv in multithreaded process.
• nghttpx: Enable backend pattern matching with http2-proxy (GH-733)
• asio: client: Send PING after 30 seconds idle (GH-847)