Changes with nginx 1.2.5 13 Nov 2012

    *) Feature: the "optional_no_ca" parameter of the "ssl_verify_client"
       directive.
       Thanks to Mike Kazantsev and Eric O'Connor.

    *) Feature: the $bytes_sent, $connection, and $connection_requests
       variables can now be used not only in the "log_format" directive.
       Thanks to Benjamin Grössing.

    *) Feature: resolver now randomly rotates addresses returned from cache.
       Thanks to Anton Jouline.

    *) Feature: the "auto" parameter of the "worker_processes" directive.

    *) Bugfix: "cache file ... has md5 collision" alert.

    *) Bugfix: OpenSSL 0.9.7 compatibility.