12.0-BETA1 vnet with pf firewall

[Ernie Luzar]

Tested with host running ipfilter and vnet running pf. Tried loading pf 
from host console or from vnet console using kldload pf.ko command and 
get this error message;

linker_load_file: /boot/kernel/pf.ko-unsupported file type.

Looks like the 12.0 version of pf which is suppose to work in vnet 
independent of what firewall is running on the host is not working.