- Add loader(8) variables for RB_DFLTROOT, RB_MUTE, and RB_PAUSE:
"boot_dfltroot", "boot_mute", and "boot_pause" respectively.
- Cause all flags passed by boot2 to set the respective loader(8)
boot_* variable. The end effect is that all flags from boot2
are now passed to the kernel.
Approved by: re (scottl)