qmail installed from ports - question about patches

[Darryl Hoar]

Greetings,
I have 5.1-release installed.  I have installed qmail from the ports.
I am following life with qmail-ldap.  I am trying to locate the
qmail.schema file.   Where can I find the official file ?
I went to the qmail-ldap patch site, but couldn't figure out
which patches were relevant .

any help would be greatly appreciated.

-Darryl