PF differences

[Petr Janda]

I heard that DragonFly's version of PF is 3.7. Ive been trying to use 
max-src-conn-rate but i get this error:

/etc/pf.conf:18: illegal timeout name max-src-conn-rate
Isnt 3.7 meant to support this feature? If so how different is the PF in 
Dragonfly to the one in OpenBSD 3.7?

Cheers,
Petr