Dear Maintainer,

grub-reboot sets next_entry in /boot/grub/grubenv. Usually this variable
is reset on boot, but that has not been happening for a while now. I
think it's related to uefi, because on my jessie laptop it seems to work
fine with grub2-pc.

When I use grub-reboot I expect to only boot into the selection _once_,
and not every time.

Thanks,
~David