Changes with nginx 0.6.21 03 Dec 2007

    *) Change: if variable values used in a "proxy_pass" directive contain
       IP-addresses only, then a "resolver" directive is not mandatory.
       resolver

    *) Bugfix: a segmentation fault might occur in worker process if a
       "proxy_pass" directive with URI-part was used; bug appeared in
       0.6.19.

    *) Bugfix: if resolver was used on platform that does not support
       kqueue, then nginx issued an alert "name is out of response".
       Thanks to Andrei Nigmatulin.

    *) Bugfix: if the $server_protocol was used in FastCGI parameters and a
       request line length was near to the "client_header_buffer_size"
       directive value, then nginx issued an alert "fastcgi: the request
       record is too big".

    *) Bugfix: if a plain text HTTP/0.9 version request was made to HTTPS
       server, then nginx returned usual response.