Changes with nginx 0.5.30 30 Jul 2007

    *) Feature: the $args variable can be set with the "set" directive.

    *) Feature: the $is_args variable.

    *) Bugfix: if a client has closed connection to mail proxy then nginx
       might not close connection to backend.

    *) Bugfix: now nginx escapes space in $memcached_key variable.

    *) Bugfix: a segmentation fault might occur in worker process when the
       HTTPS protocol was used in the "proxy_pass" directive.

    *) Bugfix: the perl $$ variable value in ngx_http_perl_module was equal
       to the master process identification number.

    *) Bugfix: fix building on Solaris/amd64 by Sun Studio 11 and early
       versions; bug appeared in 0.5.29.