{
{ This request is used by a system task to determine if it should terminate because
{ of system idle-down or operator command.  This procedure is used by system tasks
{ that will voluntarily idle or terminate.
{
{     SYP$GET_SYSTEM_TASK_STATUS (TASK_STATUS);
{
{ TASK_STATUS: (output) This parameter specifies whether the task
{ should terminate or idle.  Values of this parameter are:
{     sys$sts_ok ............................. task can continue running
{     syc$sts_idle_down_in_progress .......... task should idle
{     syc$sts_deactivate_requested ........... task deactivated via DEACTIVATE_SYSTEM_TASK (DEAST)
{
