sendmail from src on 6.0

[J.D. Bronson]

I have a question about building sendmail from src on freebsd6.0..

What database options are available (by default) for me to use?
Is there any Berkeley on the full install and if so, does anyone have 
a site.config.m4 they can share?

I would prefer to use whatever is inherent to FBSD rather than 
installing BDB (new) if I dont have to. Postfix seems to link up to 
something when I build it (hash is available) - but I am unsure of 
where/what it's picking up.

Thanks :)