[falko]

You can set up an alias in your vhost configuration like this:

                location /munin {
                       alias /var/cache/munin/www;
                       auth_basic "Restricted";
                       auth_basic_user_file /var/cache/munin/.htpasswd;
                       location ~* ^/munin/(.+\.(jpg|jpeg|gif|css|png|js|ico|xml|txt))$ {
                                alias /var/cache/munin/www/$1;
                       }
                }