File _service of Package screen

<services>
  <service name="download_src_package">
    <param name="host">vault.centos.org</param>
    <param name="protocol">http</param>
    <param name="path">/7.9.2009/os/Source/SPackages/screen-4.1.0-0.26.20120314git3c2946.el7.src.rpm</param>
  </service>
</services>