FreeBSD 12.x with ZFS: Read-write access in single-user mode

It has been about two years since I last locked myself out of my UNIX system, so I figured it was high time to amuse the masses with another round of slapstick.

Before I go any further, I should say that both of these screw-ups occurred in the course of either installing or optimizing CDE. If that isn’t a sign of devotion to an antiquated desktop environment, then what is? (Needless to say, I’m crazy about the girl.)

This time around, I had installed CDE on my FreeBSD 12.1 box, but do an error in the…