first, mount root and run the various disk providers. Add swap and
check the remaining file systems after that.
This breaks the dependency cycle for lvm, which needs writeable /dev.
Depend on rndctl in cgd.
allows you to invoke rndctl(8) during the boot.
* Add rndctl=NO and rndctl_flags="" to /etc/defaults/rc.conf.
* Document rndctl and rndctl_flags variables in rc.conf(5).