Icecast URL Auth

Draft to authenticate sources against mysql

   <mount>
        <mount-name>/*.ogg</mount-name>
        <authentication type="url">
            <option name="stream_auth"    value="http://server/script.php"/>
       </authentication>
   </mount>

One script.php to allow all mounts and user/pass could be:

<?php
header('icecast-auth-user: 1');
?>