nghttp2 @1.7.1_0: update to 1.8.0

[Schamschula (Marius Schamschula)]

nghttp2 has been updated to version 1.8.0. New this version:

• Add Architecture documents (work in progress)
• List all contributors in AUTHORS
• doc: fix out-of-tree doc builds
• Wrap AM_PATH_XML2 by m4_ifdef to handle the case when AM_PATH_XML2 is not found
• Fix configure script for non-gcc, clang build
• Document compiling apps and include h2load in configure
• Don't check for dlopen/libdl on *BSD
• Don't taint CXXFLAGS from AX_CXX_COMPILE_STDCXX_11
• lib: Tokenize extra HTTP header fields
• lib: Fix typo in HAVE_CONFIG_H name
• lib: Add HTTP/2 extension framework to send and receive non-critical frames
• tests: remove unused macros
• src: Update default cipher list
• src: Fix compile error with gcc-6 which enables C++14 by default
• asio: client: Fix connect timeout does not work, return from cb if session stopped, removing client::session::connect_timeout() function
• nghttpd: Start SETTINGS timer after it is written to output buffer
• nghttpd: Add trailer header field to status responses
• nghttpd: Add -w and -W options to change window size
• nghttpx: Worker wide blocker which is used when socket(2) is failed
• nghttpx: ConnectBlocker per backend address
• nghttpx: Interleave text/html pushed resources with associated resource
• nghttpx: Add headers given in add-response-headers for mruby response
• nghttpx: Deprecate --backend-ipv4 and --backend-ipv6 in favor of --backend-address-family
• nghttpx: Add options to specify address family of memcached connections
• nghttpx: Add encryption support for TLS ticket key retrieval
• nghttpx: Add TLS support for session cache memcached connection
• nghttpx: Refactor blacklisted cipher suite check
• nghttpx: Add TLS support for HTTP/1 backend
• nghttpx: Add request-header-field-buffer and max-request-header-fields options, deprecating header-field-buffer and max-header-fields options.
• nghttpx: Add --no-http2-cipher-black-list to allow black listed cipher suite
• nghttpx: Limit header fields from backend
• nghttpx: Fix bug that IPv6 address in Forwarded "for" is not quoted-string
• nghttpx: Support multiple frontend addresses
• integration-tests: support out-of-tree tests
• examples: fix compile warnings

[ryandesign (Ryan Carsten Schmidt)]

Thanks.

[ryandesign (Ryan Carsten Schmidt)]

r146144