BUG #5740: contrib/spi/moddatetime.c doesn't work with timezones.

The following bug has been logged online:

Bug reference:      5740
Logged by:          Dirk Heinrichs
Email address:      dirk.heinrichs@altum.de
PostgreSQL version: 8.4.5
Operating system:   Linux
Description:        contrib/spi/moddatetime.c doesn't work with timezones.
Details:

The moddatetime function provided by this module only works on columns of
type "timestamp without time zone". Would be nice if it could also provide
an analogous function moddatetime_tz which provides the same functionality
for columns of type "timestamp with time zone".

Thanks...

    Dirk