{   The purpose of this request is to process signals sent from one task
{ to another via the memory link interface.  Memory link signals are
{ taken by this routine and mapped to a 'sub-signal handler'.  This
{ handler is associated with a given memory link application via the
{ mlp$register_signal_handler request.
{
{        MLP$HANDLE_SIGNAL (ORIGINATOR, SIGNAL)
{
{ ORIGINATOR: (input) This parameter specifies the sender of the signal.
{
{ SIGNAL: (input) This parameter specifies the received signal.
{
