Changes with nginx 0.8.22 03 Nov 2009

    *) Feature: the "proxy_bind", "fastcgi_bind", and "memcached_bind"
       directives.

    *) Feature: the "access" and the "deny" directives support IPv6.

    *) Feature: the "set_real_ip_from" directive supports IPv6 addresses in
       request headers.

    *) Feature: the "unix:" parameter of the "set_real_ip_from" directive.

    *) Bugfix: nginx did not delete unix domain socket after configuration
       testing.

    *) Bugfix: nginx deleted unix domain socket while online upgrade.

    *) Bugfix: the "!-x" operator did not work.
       Thanks to Maxim Dounin.

    *) Bugfix: a segmentation fault might occur in a worker process, if
       limit_rate was used in HTTPS server.
       Thanks to Maxim Dounin.

    *) Bugfix: a segmentation fault might occur in a worker process while
       $limit_rate logging.
       Thanks to Maxim Dounin.

    *) Bugfix: a segmentation fault might occur in a worker process, if
       there was no "listen" directive in "server" block; the bug had
       appeared in 0.8.21.