{
{   The purpose of this request is to provide a means for an application
{ to cancel permission for an application to send messages to it.  MLI
{ deletes the sender application name from the list of applications which
{ are permitted to send messages to it.  If messages from the sender are
{ queued for the calling application, they will not be discarded
{ although an error status will be returned and permission to send
{ additional messages will be cancelled. If the receiving application does
{ not issue an MLP$RECEIVE_MESSAGE request to obtain them, they will be
{ deleted when the receiving application signs off.
{
{        MLP$DELETE_SENDER (APPLICATION_NAME, SENDER_NAME, STATUS)
{
{ APPLICATION_NAME: (input) This parameter specifies the application
{        name by which the calling application program identifies itself
{        to MLI and other applications.
{
{ SENDER_NAME: (input) This parameter specifies the name of the application
{        for which permission to send messages to the calling
{        application is to be cancelled.  If a NULL value is given for
{        this parameter, public permission to send messages to this
{        application will be cancelled but specific applications which
{        have been granted permission to send messages to this
{        application will not be cancelled.  An error status will be
{        returned if the sender is not currently granted permission to
{        send messages to the calling application.
{
{ STATUS: (output) This parameter specifies the request status.
{        The following status values may be returned by this request:
{           mlc$busy_interlock
{           mlc$msgs_from_sender_queued
{           mlc$ok
{           mlc$receiver_name_syntax_error
{           mlc$receiver_not_signed_on
{           mlc$sender_name_syntax_error
{           mlc$sender_not_permitted
{           mlc$system_name_no_match
{

