{
{    The purpose of this request is to read the job's system label of the
{ specified file.
{
{       QFP$READ_JOB_SYSTEM_LABEL (FILE_REFERENCE, SYSTEM_LABEL, STATUS);
{
{ FILE_REFERENCE: (input)  This is the file whose label is to be read.
{
{ SYSTEM_LABEL: (output)  This is the image of the file's job system label.
{
{ STATUS: (output) This is the record that contains the status of the request.
{      CONDITIONS:
{            jme$read_job_system_label
{            jme$sl_version_mismatch
