* poe-18.el (current-time-zone): New function.

* poe-18.el (current-time-zone): New function.
 (current-time-world-timezones, current-time-local-timezone): New variables.
 (current-time-string): Use `current-time-zone' to get local timezone.
 (current-time): Ditto.
* timezone.el: New file.
* APEL-ELS (apel-modules): Add `timezone' if existing timezone.el
  has y2k problem.
* product.el (product-string-1): Use `int-to-string' instead of
 `number-to-string'.