Changes with nginx 1.3.11                                        10 Jan 2013

*) Bugfix: a segmentation fault might occur if logging was used; the bug
had appeared in 1.3.10.

*) Bugfix: the "proxy_pass" directive did not work with IP addresses
without port specified; the bug had appeared in 1.3.10.

*) Bugfix: a segmentation fault occurred on start or during
reconfiguration if the "keepalive" directive was specified more than
once in a single upstream block.

*) Bugfix: parameter "default" of the "geo" directive did not set
default value for IPv6 addresses.
Changes with nginx 1.3.12                                        05 Feb 2013

    *) Feature: variables support in the "proxy_bind", "fastcgi_bind",
       "memcached_bind", "scgi_bind", and "uwsgi_bind" directives.

    *) Feature: the $pipe, $request_length, $time_iso8601, and $time_local
       variables can now be used not only in the "log_format" directive.
       Thanks to Kiril Kalchev.

    *) Feature: IPv6 support in the ngx_http_geoip_module.
       Thanks to Gregor Kališnik.

    *) Bugfix: in the "proxy_method" directive.

    *) Bugfix: a segmentation fault might occur in a worker process if
       resolver was used with the poll method.

    *) Bugfix: nginx might hog CPU during SSL handshake with a backend if
       the select, poll, or /dev/poll methods were used.

    *) Bugfix: the "[crit] SSL_write() failed (SSL:)" error.

    *) Bugfix: in the "client_body_in_file_only" directive; the bug had
       appeared in 1.3.9.

    *) Bugfix: in the "fastcgi_keep_conn" directive.
Changes with nginx 1.3.13                                        19 Feb 2013

*) Change: a compiler with name "cc" is now used by default.

*) Feature: support for proxying of WebSocket connections.
Thanks to Apcera and CloudBees for sponsoring this work.

*) Feature: the "auth_basic_user_file" directive supports "{SHA}"
password encryption method.
Thanks to Louis Opter.
Changes with nginx 1.3.14                                        05 Mar 2013

*) Feature: $connections_active, $connections_reading, and
$connections_writing variables in the ngx_http_stub_status_module.

*) Feature: support of WebSocket connections in the
ngx_http_uwsgi_module and ngx_http_scgi_module.

*) Bugfix: in virtual servers handling with SNI.

*) Bugfix: new sessions were not always stored if the "ssl_session_cache
shared" directive was used and there was no free space in shared
memory.
Thanks to Piotr Sikora.

*) Bugfix: multiple X-Forwarded-For headers were handled incorrectly.
Thanks to Neal Poole for sponsoring this work.

*) Bugfix: in the ngx_http_mp4_module.
Thanks to Gernot Vormayr.
Changes with nginx 1.3.15                                        26 Mar 2013

*) Change: opening and closing a connection without sending any data in
it is no longer logged to access_log with error code 400.

*) Feature: the ngx_http_spdy_module.
Thanks to Automattic for sponsoring this work.

*) Feature: the "limit_req_status" and "limit_conn_status" directives.
Thanks to Nick Marden.

*) Feature: the "image_filter_interlace" directive.
Thanks to Ian Babrou.

*) Feature: $connections_waiting variable in the
ngx_http_stub_status_module.

*) Feature: the mail proxy module now supports IPv6 backends.

*) Bugfix: request body might be transmitted incorrectly when retrying a
request to the next upstream server; the bug had appeared in 1.3.9.
Thanks to Piotr Sikora.

*) Bugfix: in the "client_body_in_file_only" directive; the bug had
appeared in 1.3.9.

*) Bugfix: responses might hang if subrequests were used and a DNS error
happened during subrequest processing.
Thanks to Lanshun Zhou.

*) Bugfix: in backend usage accounting.
Changes with nginx 1.3.16                                        16 Apr 2013

*) Bugfix: a segmentation fault might occur in a worker process if
subrequests were used; the bug had appeared in 1.3.9.

*) Bugfix: the "tcp_nodelay" directive caused an error if a WebSocket
connection was proxied into a unix domain socket.

*) Bugfix: the $upstream_response_length variable has an incorrect value
"0" if buffering was not used.
Thanks to Piotr Sikora.

*) Bugfix: in the eventport and /dev/poll methods.
Changes with nginx 1.4.0                                         24 Apr 2013

*) Bugfix: nginx could not be built with the ngx_http_perl_module if the
--with-openssl option was used; the bug had appeared in 1.3.16.

*) Bugfix: in a request body handling in the ngx_http_perl_module; the
bug had appeared in 1.3.9.
Changes with nginx 1.5.0                                         07 May 2013

*) Security: a stack-based buffer overflow might occur in a worker
process while handling a specially crafted request, potentially
resulting in arbitrary code execution (CVE-2013-2028); the bug had
appeared in 1.3.9.
Thanks to Greg MacManus, iSIGHT Partners Labs.
Changes with nginx 1.5.1                                         04 Jun 2013

*) Feature: the "ssi_last_modified", "sub_filter_last_modified", and
"xslt_last_modified" directives.
Thanks to Alexey Kolpakov.

*) Feature: the "http_403" parameter of the "proxy_next_upstream",
"fastcgi_next_upstream", "scgi_next_upstream", and
"uwsgi_next_upstream" directives.

*) Feature: the "allow" and "deny" directives now support unix domain
sockets.

*) Bugfix: nginx could not be built with the ngx_mail_ssl_module, but
without ngx_http_ssl_module; the bug had appeared in 1.3.14.

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

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

*) Bugfix: the "fail_timeout" parameter of the "server" directive in the
"upstream" context might not work if "max_fails" parameter was used;
the bug had appeared in 1.3.0.

*) Bugfix: a segmentation fault might occur in a worker process if the
"ssl_stapling" directive was used.
Thanks to Piotr Sikora.

*) Bugfix: in the mail proxy server.
Thanks to Filipe Da Silva.

*) Bugfix: nginx/Windows might stop accepting connections if several
worker processes were used.
Changes with nginx 1.5.2                                         02 Jul 2013

*) Feature: now several "error_log" directives can be used.

*) Bugfix: the $r->header_in() embedded perl method did not return value
of the "Cookie" and "X-Forwarded-For" request header lines; the bug
had appeared in 1.3.14.

*) Bugfix: in the ngx_http_spdy_module.
Thanks to Jim Radford.

*) Bugfix: nginx could not be built on Linux with x32 ABI.
Thanks to Serguei Ivantsov.
Changes with nginx 1.5.3                                         30 Jul 2013

*) Change in internal API: now u->length defaults to -1 if working with
backends in unbuffered mode.

*) Change: now after receiving an incomplete response from a backend
server nginx tries to send an available part of the response to a
client, and then closes client connection.

*) Bugfix: a segmentation fault might occur in a worker process if the
ngx_http_spdy_module was used with the "client_body_in_file_only"
directive.

*) Bugfix: the "so_keepalive" parameter of the "listen" directive might
be handled incorrectly on DragonFlyBSD.
Thanks to Sepherosa Ziehau.

*) Bugfix: in the ngx_http_xslt_filter_module.

*) Bugfix: in the ngx_http_sub_filter_module.