$HTTP["host"] =~ "^beta\.mysite\.com$" {

        $HTTP["url"] =~ "^/blog/" {
            server.document-root = "/home/web_user/habari"
            dir-listing.activate = "disable"
            url.rewrite-once = (
                "^/blog/(?!scripts/|3rdparty/|system/|doc/|user/(?:themes/|files/|plugins/|locales/|sites/))[^?]*(\?(.*))?" => "/blog/index.php/$1"
            )
        }

        alias.url = (
           "/blog" => "/home/web_user/habari"
        )

        url.rewrite-once = (
           "^(/blog.*)$" => "$1",
           "^(/.*)$" => "/mysite.fcgi$1"
        )
}