BUG #1970: Existing /etc/pam.d/postgresql clobbered by RPM install

The following bug has been logged online:

Bug reference: 1970
Logged by: Mark Gibson
Email address: gibsonm(at)cromwell(dot)co(dot)uk
PostgreSQL version: 8.0.4
Operating system: Redhat Enterprise Linux 4
Description: Existing /etc/pam.d/postgresql clobbered by RPM install
Details:

Hello, I noticed that when installing the 8.0.4 RPM's
it replaced our existing /etc/pam.d/postgresql - this caused our system to
break temporarily, as it was missing the following line:

account required pam_stack.so service=system-auth

I don't know whether this is required for all systems or is just a
peculiarity of our setup, but could the RPM be changed to not clobber this
file in the future. I believe some RPM's install conflicting configs with
the .rpmnew extension. Cheers.