File _service of Package screen

<services>
  <service name="download_src_package">
    <param name="protocol">http</param>
    <param name="host">dl.fedoraproject.org</param>
    <param name="path">/pub/fedora/linux/releases/23/Everything/source/SRPMS/s/screen-4.3.1-2.fc23.src.rpm</param>
  </service>
</services>