Log message:
pullup to pkgsrc-2013Q3, resolves ticket #4263

Updated to nginx 1.5.7

Changes with nginx 1.5.7                                         19 Nov 2013

    *) Security: a character following an unescaped space in a request line
       was handled incorrectly (CVE-2013-4547); the bug had appeared in
       0.8.41.
       Thanks to Ivan Fratric of the Google Security Team.

    *) Change: a logging level of auth_basic errors about no user/password
       provided has been lowered from "error" to "info".

    *) Feature: the "proxy_cache_revalidate", \ 
"fastcgi_cache_revalidate",
       "scgi_cache_revalidate", and "uwsgi_cache_revalidate" \ 
directives.

    *) Feature: the "ssl_session_ticket_key" directive.
       Thanks to Piotr Sikora.

    *) Bugfix: the directive "add_header Cache-Control ''" added a
       "Cache-Control" response header line with an empty value.

    *) Bugfix: the "satisfy any" directive might return 403 error \ 
instead of
       401 if auth_request and auth_basic directives were used.
       Thanks to Jan Marc Hoffmann.

    *) Bugfix: the "accept_filter" and "deferred" parameters \ 
of the "listen"
       directive were ignored for listen sockets created during binary
       upgrade.
       Thanks to Piotr Sikora.

    *) Bugfix: some data received from a backend with unbufferred proxy
       might not be sent to a client immediately if "gzip" or \ 
"gunzip"
       directives were used.
       Thanks to Yichun Zhang.

    *) Bugfix: in error handling in ngx_http_gunzip_filter_module.

    *) Bugfix: responses might hang if the ngx_http_spdy_module was used
       with the "auth_request" directive.

    *) Bugfix: memory leak in nginx/Windows.

Changes with nginx 1.5.6                                         01 Oct 2013

    *) Feature: the "fastcgi_buffering" directive.

    *) Feature: the "proxy_ssl_protocols" and "proxy_ssl_ciphers"
       directives.
       Thanks to Piotr Sikora.

    *) Feature: optimization of SSL handshakes when using long certificate
       chains.

    *) Feature: the mail proxy supports SMTP pipelining.

    *) Bugfix: in the ngx_http_auth_basic_module when using "$apr1$"
       password encryption method.
       Thanks to Markus Linnala.

    *) Bugfix: in MacOSX, Cygwin, and nginx/Windows incorrect location might
       be used to process a request if locations were given using characters
       in different cases.

    *) Bugfix: automatic redirect with appended trailing slash for proxied
       locations might not work.

    *) Bugfix: in the mail proxy server.

    *) Bugfix: in the ngx_http_spdy_module.

Changes with nginx 1.5.5                                         17 Sep 2013

    *) Change: now nginx assumes HTTP/1.0 by default if it is not able to
       detect protocol reliably.

    *) Feature: the "disable_symlinks" directive now uses O_PATH on Linux.

    *) Feature: now nginx uses EPOLLRDHUP events to detect premature
       connection close by clients if the "epoll" method is used.

    *) Bugfix: in the "valid_referers" directive if the \ 
"server_names"
       parameter was used.

    *) Bugfix: the $request_time variable did not work in nginx/Windows.

    *) Bugfix: in the "image_filter" directive.
       Thanks to Lanshun Zhou.

    *) Bugfix: OpenSSL 1.0.1f compatibility.
       Thanks to Piotr Sikora.

Changes with nginx 1.5.4                                         27 Aug 2013

    *) Change: the "js" extension MIME type has been changed to
       "application/javascript"; default value of the \ 
"charset_types"
       directive was changed accordingly.

    *) Change: now the "image_filter" directive with the \ 
"size" parameter
       returns responses with the "application/json" MIME type.

    *) Feature: the ngx_http_auth_request_module.

    *) Bugfix: a segmentation fault might occur on start or during
       reconfiguration if the "try_files" directive was used with an empty
       parameter.

    *) Bugfix: memory leak if relative paths were specified using variables
       in the "root" or "auth_basic_user_file" directives.

    *) Bugfix: the "valid_referers" directive incorrectly executed regular
       expressions if a "Referer" header started with "https://".
       Thanks to Liangbin Li.

    *) Bugfix: responses might hang if subrequests were used and an SSL
       handshake error happened during subrequest processing.
       Thanks to Aviram Cohen.

    *) Bugfix: in the ngx_http_autoindex_module.

    *) Bugfix: in the ngx_http_spdy_module.