The following man page appears to be missing: http://www.freebsd.org/cgi/man.cgi?query=pf.conf&sektion=5 I am filing this bug as a reminder to fix this. I do not expect it to be fixed anytime soon. It is a low priority.
/usr/share/man/man5/pf.conf.5.xz sys-freebsd/freebsd-pf-9.1_rc3 ....