Update www/nginx-devel to 1.9.4.

Changes with nginx 1.9.4                                         18 Aug 2015

    *) Change: the "proxy_downstream_buffer" and "proxy_upstream_buffer"
       directives of the stream module are replaced with the
       "proxy_buffer_size" directive.

    *) Feature: the "tcp_nodelay" directive in the stream module.

    *) Feature: multiple "sub_filter" directives can be used simultaneously.

    *) Feature: variables support in the search string of the "sub_filter"
       directive.

    *) Workaround: configuration testing might fail under Linux OpenVZ.
       Thanks to Gena Makhomed.

    *) Bugfix: old worker processes might hog CPU after reconfiguration with
       a large number of worker_connections.

    *) Bugfix: a segmentation fault might occur in a worker process if the
       "try_files" and "alias" directives were used inside a location given
       by a regular expression; the bug had appeared in 1.7.1.

    *) Bugfix: the "try_files" directive inside a nested location given by a
       regular expression worked incorrectly if the "alias" directive was
       used in the outer location.

    *) Bugfix: in hash table initialization error handling.

    *) Bugfix: nginx could not be built with Visual Studio 2015.

Changes with nginx 1.9.3                                         14 Jul 2015

    *) Change: duplicate "http", "mail", and "stream" blocks are now
       disallowed.

    *) Feature: connection limiting in the stream module.

    *) Feature: data rate limiting in the stream module.

    *) Bugfix: the "zone" directive inside the "upstream" block did not work
       on Windows.

    *) Bugfix: compatibility with LibreSSL in the stream module.
       Thanks to Piotr Sikora.

    *) Bugfix: in the "--builddir" configure parameter.
       Thanks to Piotr Sikora.

    *) Bugfix: the "ssl_stapling_file" directive did not work; the bug had
       appeared in 1.9.2.
       Thanks to Faidon Liambotis and Brandon Black.

    *) Bugfix: a segmentation fault might occur in a worker process if the
       "ssl_stapling" directive was used; the bug had appeared in 1.9.2.
       Thanks to Matthew Baldwin.

Changes with nginx 1.9.2                                         16 Jun 2015

    *) Feature: the "backlog" parameter of the "listen" directives of the
       mail proxy and stream modules.

    *) Feature: the "allow" and "deny" directives in the stream module.

    *) Feature: the "proxy_bind" directive in the stream module.

    *) Feature: the "proxy_protocol" directive in the stream module.

    *) Feature: the -T switch.

    *) Feature: the REQUEST_SCHEME parameter added to the fastcgi.conf,
       fastcgi_params, scgi_params, and uwsgi_params standard configuration
       files.

    *) Bugfix: the "reuseport" parameter of the "listen" directive of the
       stream module did not work.

    *) Bugfix: OCSP stapling might return an expired OCSP response in some
       cases.

Changes with nginx 1.9.1                                         26 May 2015

    *) Change: now SSLv3 protocol is disabled by default.

    *) Change: some long deprecated directives are not supported anymore.

    *) Feature: the "reuseport" parameter of the "listen" directive.
       Thanks to Yingqi Lu at Intel and Sepherosa Ziehau.

    *) Feature: the $upstream_connect_time variable.

    *) Bugfix: in the "hash" directive on big-endian platforms.

    *) Bugfix: nginx might fail to start on some old Linux variants; the bug
       had appeared in 1.7.11.

    *) Bugfix: in IP address parsing.
       Thanks to Sergey Polovko.

Changes with nginx 1.9.0                                         28 Apr 2015

    *) Change: obsolete aio and rtsig event methods have been removed.

    *) Feature: the "zone" directive inside the "upstream" block.

    *) Feature: the stream module.

    *) Feature: byte ranges support in the ngx_http_memcached_module.
       Thanks to Martin Mlynar.

    *) Feature: shared memory can now be used on Windows versions with
       address space layout randomization.
       Thanks to Sergey Brester.

    *) Feature: the "error_log" directive can now be used on mail and server
       levels in mail proxy.

    *) Bugfix: the "proxy_protocol" parameter of the "listen" directive did
       not work if not specified in the first "listen" directive for a
       listen socket.

Changes with nginx 1.7.12                                        07 Apr 2015

    *) Feature: now the "tcp_nodelay" directive works with backend SSL
       connections.

    *) Feature: now thread pools can be used to read cache file headers.

    *) Bugfix: in the "proxy_request_buffering" directive.

    *) Bugfix: a segmentation fault might occur in a worker process when
       using thread pools on Linux.

    *) Bugfix: in error handling when using the "ssl_stapling" directive.
       Thanks to Filipe da Silva.

    *) Bugfix: in the ngx_http_spdy_module.

Changes with nginx 1.7.11                                        24 Mar 2015

    *) Change: the "sendfile" parameter of the "aio" directive is
       deprecated; now nginx automatically uses AIO to pre-load data for
       sendfile if both "aio" and "sendfile" directives are used.

    *) Feature: experimental thread pools support.

    *) Feature: the "proxy_request_buffering", "fastcgi_request_buffering",
       "scgi_request_buffering", and "uwsgi_request_buffering" directives.

    *) Feature: request body filters experimental API.

    *) Feature: client SSL certificates support in mail proxy.
       Thanks to Sven Peter, Franck Levionnois, and Filipe Da Silva.

    *) Feature: startup speedup when using the "hash ... consistent"
       directive in the upstream block.
       Thanks to Wai Keen Woon.

    *) Feature: debug logging into a cyclic memory buffer.

    *) Bugfix: in hash table handling.
       Thanks to Chris West.

    *) Bugfix: in the "proxy_cache_revalidate" directive.

    *) Bugfix: SSL connections might hang if deferred accept or the
       "proxy_protocol" parameter of the "listen" directive were used.
       Thanks to James Hamlin.

    *) Bugfix: the $upstream_response_time variable might contain a wrong
       value if the "image_filter" directive was used.

    *) Bugfix: in integer overflow handling.
       Thanks to R辿gis Leroy.

    *) Bugfix: it was not possible to enable SSLv3 with LibreSSL.

    *) Bugfix: the "ignoring stale global SSL error ... called a function
       you should not call" alerts appeared in logs when using LibreSSL.

    *) Bugfix: certificates specified by the "ssl_client_certificate" and
       "ssl_trusted_certificate" directives were inadvertently used to
       automatically construct certificate chains.


(fhajny)