File _service of Package json-c

<services>
  <service name="download_src_package">
    <param name="host">vault.centos.org</param>
    <param name="protocol">http</param>
    <param name="path">/7.2.1511/os/Source/SPackages/json-c-0.11-4.el7_0.src.rpm</param>
  </service>
</services>