{
{   The purpose of this request is to compute the "universal" date and time
{ equivalent to a date and time expressed relative to a "local" time zone.
{ The "universal" time zone is that of Greenwich, England, often called
{ Greenwich Mean Time.
{
{       PMP$COMPUTE_UNIVERSAL_DATE_TIME (LOCAL_DATE_TIME, TIME_ZONE,
{         UNIVERSAL_DATE_TIME, STATUS)
{
{ LOCAL_DATE_TIME: (input)  This parameter specifies the local date and time.
{
{ TIME_ZONE: (input)  This parameter specifies the time zone that the local
{       date and time is relative to.
{
{ UNIVERSAL_DATE_TIME: (output)  This parameter specifies the resulting
{       universal date and time.
{
{ STATUS: (output)  This parameter specifies the request status.
{       CONDITIONS: pme$compute_overflow
{                   pme$invalid_year
{                   pme$invalid_time_zone
{
