code: def addcc(self, cclist, comment=None):
          
          vals = self.bugzilla.build_update(comment=comment,
                                            cc_add=cclist)
          log.debug("addcc: update=%s", vals)
  
          return self.bugzilla.update_bugs(self.bug_id, vals)
docs: Adds the given email addresses to the CC list for this bug.
          cclist: list of email addresses (strings)
          comment: optional comment to add to the bug