Kyle Evans fa30d9ed75 libbe(3): allow creation of arbitrary depth boot environments
libbe currently only provides an API to create a recursive boot environment,
without any formal support for intentionally limiting the depth. This
changeset adds an API, be_create_depth, that may be used to arbitrarily
restrict the depth of the new BE.

Submitted by:	Rob Fairbanks <rob.fx907 gmail com>
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D18564
2019-04-22 13:43:38 +00:00
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