OpenBSD 4.7 (to be released in May) changes syntax of the nat and rdr
PF rules. I have implemented support for this in fwbuilder 4.0 build
2828. I need help with testing this tough. If you use PF and have 4.7,
please try fwbuilder 4 build 2828 or later as soon as possible. I
would like to make sure the new code works so we wont have to chase
bugs after fwbuilder 4.0 is released.