File _service of Package libsieve

<services>
  <service name="download_url">
    <param name="host">downloads.sourceforge.net</param>
    <param name="protocol">http</param>
    <param name="path">/project/libsieve/libsieve/2.2.7/libsieve-2.2.7.tar.gz</param>
  </service>
</services>