GRUB2 stable almost works but GRUB2 current doesn't for DragonFlyBSD Unix

[David Chmelik]

In recent days/weeks/months, I tried to boot DragonFlyBSD Unix from 
GRUB2.  The stable version partially boots it but then DragonFlyBSD asks 
to manually mount the root drive (which already automatically configured 
that in the installer) which seems a problem with DragonFlyBSD, not 
GRUB2.  I thought maybe the current GRUB2 commit might do better.  
Instead, with the same manual boot commands ( 
https://www.dragonflydigest.com/2019/01/14/22409.html ) current GRUB2 
just immediately reboots instead of partially booting DragonFlyBSD.