{
{     This procedure builds the supervisory message FC/BRK/R and sends it
{   to PASSON for delivery to NAM.  NAM interprets this message as a direct
{   to throw away any input or output queued anywhere between PASSON and
{   the terminal for this job.
{
{       IFP$PURGE_CONNECTION_IO (STATUS)
{
{ STATUS: (output) This parameter specifies the request status.
{       CONDITIONS:
{             ife$connection_break_disconnect
{             mlc$c170_c170_illegal
{             mlc$message_too_long
{             mlc$mli_internal_error
{             mlc$receiver_name_syntax_error
{             mlc$sender_name_syntax_error
{             mlc$sender_not_permitted
{             mlc$sender_not_signed_on
{             mlc$signal_failed_ignored
{             mlc$signal_to_c170_ignored
{             mlc$system_name_no_match
{
