BUG #1416: Win Installer doesn't grab registry settings.

The following bug has been logged online:

Bug reference:      1416
Logged by:          Joseph Donahue
Email address:      joseph@odonahue.com
PostgreSQL version: 8.0
Operating system:   Win2K  SP4
Description:        Win Installer doesn't grab registry settings.
Details:

When upgrading from an 8 beta to the 8.0 release, the installer wizard
presented the service configuration page with default values.  Normally, an
MSI script will check the registry for previous installations and adjust
accordingly.  This page at the very least should have been filled in with
values already present in the registry.  An even better approach would have
been detection of the previous installation and presentation of a different
screen indicating that detection and offering the option of upgrading using
the current registry set.