EFI and zfs raid mirror partial fail (14.0 and RELENG_13)

From: mike tancsa <mike_at_sentex.net>
Date: Fri, 01 Dec 2023 20:38:10 UTC 
Was testing out a zfs mirror install and noticed that the install 
process correctly sets up the same partition scheme on both drives, but 
only formats and installs the efi boot files on the one disk. For a 
proper mirror and protection, should not the second disk also have the 
ability to boot ?

Also a little problematic is that the fstab has /dev/gtp/efiboot0 mount 
automatically.  I would think it would be better to optionally mount 
this. Otherwise, if that disk died, it would be stuck in single user 
mode since it cant mount that disk.

     ---Mike