{
{    The purpose of this request is to gain exclusive access to a global
{ socket.  Assuming the global socket exists, control is returned when the
{ exclusive access is acquired.
{
{    This request must be symmeterical with a subsequent free exclusive access
{ request if the global socket exists.
{
{       NLP$UDP_GET_EXCLUSIVE_VIA_GSID (GLOBAL_SOCKET_ID, GLOBAL_SOCKET)
{
{  GLOBAL_SOCKET_ID: (input)  This parameter specifies the global socket
{        identifier of the global socket to be accessed.
{
{  GLOBAL_SOCKET: (output)  This parameter specifies the accessed global
{        socket.  The value is NIL if the global socket does not exist.
{
