http://cypherpunk-handbook.i2p/articles/openbsd.html
Fedora Secureblue, QubesOS (per NetVM) and Tails have this,
Whonix and others don't. 29 - rcctl(8) rcctl is a simple utility to maintain rc.conf.local, the system
daemon configuration database for OpenBSD. Compared to systemd garbage
or SysVinit, rcctl is very lightweight, secure, stable and easy to
understand and use.