{
{    The purpose of this procedure is to close the specified network sap.  If
{ the network sap is open in the device i.e a channel connection exists between
{ the Network Access Agent (NAA) and the Network Access Provider (NAP), a
{ disconnect is sent to the NAP to close the network sap in the device.
{
{       NLP$NA_CLOSE_SAP (SAP_ID, STATUS)
{
{ SAP_ID: (input)  This parameter specifies the identifier of the network sap
{       to be closed.
{
{ STATUS: (output) This parameter specifies the request status.
{       CONDITIONS:
{             nae$na_sap_not_open
{       IDENTIFIER: 'NA'
{
