{    The purpose of this request is to call the specified mainframe(s) in a
{ cluster to retrieve leveling data.  Leveling data may be any information a
{ site determines to be necessary in order to level interactive jobs.  This
{ routine functions as a co-routine with the jmp$get_leveling_data request.
{
{       JMP$CLUSTER_GET_LEVELING_DATA (TARGET_MAINFRAME_ID, TARGET_OPTIONS_P,
{             DATA_PACKET_SIZE, DATA_AREA_P, MAINFRAMES_PROCESSED,
{             NUMBER_OF_DATA_PACKETS, STATUS);
{
{ TARGET_MAINFRAME_ID: (input)  This is the mainframe to be called.  If the
{       identifier pmc$null_mainframe_id is specified, the function will be
{       performed on all mainframes in the cluster.
{
{ TARGET_OPTIONS_P: (input)  A pointer to a sequence that contains the caller
{       information and options about what data to be returned.
{
{ DATA_PACKET_SIZE: (input)  This indicates the size of data packets that the
{       called function will return.
{
{ DATA_AREA_P: (input, output)  The area where the leveling data is written.
{
{ MAINFRAMES_PROCESSED: (output)  This indicates what mainframes were processed
{       by this request.
{
{ NUMBER_OF_DATA_PACKETS: (output)  This indicates the number of data packets
{       in the data_area_p sequence.  Each mainframe called returns data as one
{       data packet.
{
{ STATUS: (output) This is the status of the request.
{      CONDITION:
{            none
