Remove the dependency on the kernel -- in particular the gctl request to the GEOM_BSD class -- to translate the absolute offsets in the label to relative ones. This makes bslabel(8) work correctly with GEOM_PART and also when the BSD label is nested under arbitrary partitioning schemes.
Remove the dependency on the kernel -- in particular the gctl request to
the GEOM_BSD class -- to translate the absolute offsets in the label to
relative ones. This makes bslabel(8) work correctly with GEOM_PART and
also when the BSD label is nested under arbitrary partitioning schemes.

Inspired by:	Eygene Ryabinkin <rea-fbsd@codelabs.ru>
Approved by:	re (kib)

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