The -hd switch is similar to the –h switch described above and applies only to Unix. It suppresses the ASB error #250, which would normally be generated, but removes and cleans up the process as soon as it goes into a terminal input wait state.
This historic switch is probably no longer useful. If you don’t want to get an immediate error on receipt of the SIGHUP signal, just don’t specify any of the –h* switches.
