{
{   The purpose of this procedure is to wait for a clear to
{ send condition on the given global socket. However, the
{ clear to send indication cannot be relied upon as the available
{ outbound capacity will be used by the next queued task waiting
{ to send data.
{
{       NLP$UDP_AWAIT_CLEAR_TO_SEND (GLOBAL_SOCKET_ID, ACTIVITY_COMPLETE)
{
{ GLOBAL_SOCKET_ID: (input) This parameter specifies the global
{       socket identifier.
{
{ ACTIVITY_COMPLETE: (output) This parameter is set to TRUE on the
{       arrival of the clear to send indication and when the current
{       task is at the head of the send queue.
{
