Changes with nginx 1.5.12 18 Mar 2014
*) Security: a heap memory buffer overflow might occur in a worker process while handling a specially crafted request by ngx_http_spdy_module, potentially resulting in arbitrary code execution (CVE-2014-0133). Thanks to Lucas Molas, researcher at Programa STIC, Fundación Dr. Manuel Sadosky, Buenos Aires, Argentina.
*) Feature: the "proxy_protocol" parameters of the "listen" and "real_ip_header" directives, the $proxy_protocol_addr variable.
*) Bugfix: in the "fastcgi_next_upstream" directive. Thanks to Lucas Molas.