File _service of Package c-intro-and-ref

<!-- -*- xml -*- -->
<services>
  <service name="obs_scm" mode="manual">
	<param name="versionformat">%cd.@TAG_OFFSET@.%h</param>
    <!-- There's no tag in this repository use the first commit
         value for the start of the counter. -->
    <param name="parent-tag">22160549245bb3d1358a48136ae0b8e02db3a5fa</param>
	<param name="url">https://git.savannah.gnu.org/git/c-intro-and-ref.git</param>
	<param name="scm">git</param>
    <param name="revision">trunk</param>
  </service>
  <service name="set_version" mode="manual"/>
  <service mode="buildtime" name="tar" />
  <service mode="buildtime" name="recompress">
    <param name="file">*.tar</param>
    <param name="compression">gz</param>
  </service>
</services>