File _service of Package clawsker

<services>
 <service name="download_url">
   <param name="protocol">https</param>
   <param name="host">www.claws-mail.org</param>
   <param name="path">tools/clawsker-1.3.8.tar.xz</param>
 </service>
 <service name="download_url">
   <param name="protocol">https</param>
   <param name="host">www.claws-mail.org</param>
   <param name="path">tools/clawsker-1.3.8.tar.xz.asc</param>
 </service>
 <service name="set_version"/>
</services>