nginx 0.7.18

Changes with nginx 0.7.18                                        13 Oct 2008

   *) Change: the "underscores_in_headers" directive; now nginx does not
      allows underscores in a client request header line names.

   *) Feature: the ngx_http_secure_link_module.

   *) Feature: the "real_ip_header" directive supports any header.

   *) Feature: the "log_subrequest" directive.

   *) Feature: the $realpath_root variable.

   *) Feature: the "http_502" and "http_504" parameters of the
      "proxy_next_upstream" directive.

   *) Bugfix: the "http_503" parameter of the "proxy_next_upstream" or
      "fastcgi_next_upstream" directives did not work.

   *) Bugfix: nginx might send a "Transfer-Encoding: chunked" heaer line
      for HEAD requests.

   *) Bugfix: now accept threshold depends on worker_connections.