The sources used to regenerate data are:

 * The Olson database, tracing all world time zone changes since 1970,
   widely used under Unix systems and dedicated to the public domain.

 * Unicode CLDR's windowsZones.xml, used by Windows itself as source
   for naming timezones and providing the correspondance with the
   Olson zones. It is licensed under a MIT-styled license.
Signed-off-by: Giovanni Mascellani <gmascellani@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>