Changes 1.7.0:
Reset (RST_STREAM) stream if flow control window gets overflow
Validate :authroity, host, and :scheme value more strictly
Check request/response submission error based side of session
Strict outgoing idle stream detection
Return error from nghttp2_submit_{headers,request} when self dependency is made
Add -ldl to APPLDFLAGS for static openssl linking
asio: Stop acceptor on server::http2::stop
asio: Rename http2::get_io_services() as http2::io_services()
h2load: Support UNIX domain socket
h2load: Improve readability of traffic numbers
h2load: Remove "auto" for -m option
h2load: Show progress in rate mode
h2load: Perform sampling for request and connection timings to reduce memory consumption
nghttpd: Add --no-content-length option to omit content-length in response
nghttpx: Interleave pushed streams with the associated stream if pushed streams are javascript and CSS resources
nghttpx: The initial value of request/response buffer is increased to 128K
nghttpx: Fix bug that --listener-disable-timeout option is not used
nghttpx: Don't emit :authority if request does not contain authority information
nghttpx: Add clarification of quotes in configuration file
nghttpx: Don't allow certain characters in host and :scheme header field
nghttpx: Add RFC 7239 Forwarded header field support
nghttpx: Fix crash when running on IPv6 only (Patch from Vernon Tang)
nghttpx: Take into account of trailers when applying max_header_fields
nghttpx: Don't apply max_header_fields and header_field_buffer limit to response
nghttpx: Strict validation for header fields given in configuration
nghttpx: header value should not be lower-cased (Patch from ayanamist)

(adam)