Add bug closer for the old Heimdal removal bug

debian/changelog

 libheimdal-kadm5-perl (0.08-5) UNRELEASED; urgency=medium
 
+  * Build with current Heimdal.  (Closes: #837628)
   * Guard against a NULL mod_name in getModName and return undef.  Thanks,
     Sergio Gelato.  (Closes: #670517)
   * Convert to a proper 3.0 (quilt) package with managed patches.