docs: def set_status(task, prefix, expnum, version, ccd, status):
      """
      set the processing status of the given program.
      @param task: name of the processing task
      @param prefix: was there a prefix on the exposure number processed?
      @param expnum: exposure number processed.
      @param version: which version of the exposure? (p, s, o)
      @param ccd: the number of the CCD processing.
      @param status: What status to record:  "SUCCESS" we hope.
      @return: Success?
      """
      return set_tag(expnum, get_process_tag(prefix+task, ccd, version), status)