Changes with nginx 1.11.2 05 Jul 2016
*) Change: now nginx always uses internal MD5 and SHA1 implementations;
the --with-md5 and --with-sha1 configure options were canceled.
*) Feature: variables support in the stream module.
*) Feature: the ngx_stream_map_module.
*) Feature: the ngx_stream_return_module.
*) Feature: a port can be specified in the "proxy_bind", "fastcgi_bind",
"memcached_bind", "scgi_bind", and "uwsgi_bind" directives.
*) Feature: now nginx uses the IP_BIND_ADDRESS_NO_PORT socket option
when available.
*) Bugfix: a segmentation fault might occur in a worker process when
using HTTP/2 and the "proxy_request_buffering" directive.
*) Bugfix: the "Content-Length" request header line was always added to
requests passed to backends, including requests without body, when
using HTTP/2.
*) Bugfix: "http request count is zero" alerts might appear in logs when
using HTTP/2.
*) Bugfix: unnecessary buffering might occur when using the "sub_filter"
directive; the issue had appeared in 1.9.4.
