John Baldwin f9a0145857 Allow boot0cfg to force a PXE boot via boot0 on the next boot.
- Fix boot0 to check for PXE when using the pre-set setting for the
  preferred slice.
- Update boot0cfg to use slice 6 to select PXE.  Accept a 'pxe' argument
  instead of a number for the 's' option as a way to select PXE as well.

Submitted by:	Andrew Boyer  aboyer averesystems
MFC after:	2 weeks
2011-12-20 15:19:29 +00:00
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