Changes with nginx 1.3.9 27 Nov 2012
*) Feature: support for chunked transfer encoding while reading client request body.
*) Feature: the $request_time and $msec variables can now be used not only in the "log_format" directive.
*) Bugfix: cache manager and cache loader processes might not be able to start if more than 512 listen sockets were used.
*) Bugfix: in the ngx_http_dav_module.