Is the "pf_rules" option gone?

Hello,

Back in the days, 10 years or so, there was a rc.conf directive called "pf_rules", which one could use to override the location of the config file for PF.
I don't see this option in the default rc.conf now.
Is it still valid?
If so, how could one set it in rc.conf.local with rcctl?

Regards, Martin