File _service of Package ffmpeg

<services>
  <service name="download_url">
    <param name="host">ffmpeg.org</param>
    <param name="protocol">https</param>
    <param name="path">/releases/ffmpeg-4.0.2.tar.xz</param>
  </service>
  <service name="download_url">
    <param name="host">ffmpeg.org</param>
    <param name="protocol">https</param>
    <param name="path">/releases/ffmpeg-4.0.2.tar.xz.asc</param>
  </service>
</services>