squid6 -  squid-pf seems more rational than squid-ipf for platforms covered / popularity?

Building squid6 from source due to the smartos build having squid-ipf vs squid-pf enabled. I could be wrong, but pf seems to be more widely used.

Request to change - or quash my assumption ;)

$ pkgin pkg-build-defs squid
... --enable-ipf-transparent ...