{
{    The purpose of this procedure is to access the channel connection
{ coresponding to the given connection id to check if sufficient resources are
{ available to send data.  If other senders are active or resources are
{ unavailable, the current task is queued at the end of the send queue.  The
{ task is dequeued and readied whenever resources become available.
{
{       NLP$SK_TCP_AWAIT_CLEAR_TO_SEND (CONNECTION_ID, ACTIVITY_COMPLETE)
{
{ CONNECTION_ID: (input)  This parameter specifies the channel connection
{       identifier.
{
{ ACTIVITY_COMPLETE: (output)  This parameter is set to TRUE if the clear
{       to send condition is present.
{
