Good catch! In reviewing the revision history it appears this came from upstream. I am guessing this is totally not what we want shipping in Fedora as postgresql based authentication is far less common and more difficult to use than passwd. I will see if I can fix this... already very close to absolute development freeze. =(
Bad news, I missed the development freeze when I built this package, so unfortunately FC2 will ship with a non-functional by default dovecot. The FC2 update that fixes a few bugs and has a functional default config is in the pipe. I may clean it up a bit more before releasing it later.
Warren
