While the display name is not a member of TIME_ZONE_INFORMATION, it is
still available in the registry. In English it corresponds to the
comments preceding groups of time zones in Unicode CLDR's
windowsZones.xml.
Signed-off-by: Giovanni Mascellani <gmascellani@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>