{
{    The purpose of this procedure is to dequeue all the messages from the
{ input queue on the given channel connection.  The messages in the queue are
{ in the LIFO order.
{
{       NLP$CC_GET_RECEIVED_MESSAGES (CL_CONNECTION, RECEIVED_MESSAGES)
{
{ CL_CONNECTION: (input, output)  This parameter specifies the interlayer
{       structure associated with the given channel connection.
{
{ RECEIVED_MESSAGES: (output)  This parameter specifies the list of received
{       messages.
{
