Feature #5061: freebsd boot loader integration (loader project)
bootadm update-archive should not fail if grub1 is missing
bootadm fails to update the boot archive if there is no <mountpoint>/boot/grub/stage2 file. This failure happens because of is_grub() check in bootadm_upgrade.c: get _findroot_cap().
This check is redundant and unneeded, because is_grub() check is only needed for menu management, and bam_menu(), which is used to call all menu related functions, is using is_grub() check before doing anything else.