Provide a disklabel specific MD hook MD_DISKLABEL_PART_INDEX_CHECK
to allow MD code to veto specific disklabel partitions for specific
uses, e.g. to make sure a boot partition does not end up as sd0a

Provide a disklabel specific MD hook MD_DISKLABEL_PART_INDEX_CHECK
to allow MD code to veto specific disklabel partitions for specific
uses, e.g. to make sure a boot partition does not end up as sd0a.
Most architectures won't need this, as the file system type makes
the generic heuristic do the right thing (e.g. move the ESP to wd0e
for x86) - but for some architectures the boot partition uses FFS
and our heuristic fails.

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Add missing double p and d for stopped and overriden accordingly.
Fix few more typos along the way, mainly in copy-pasted comments.

Add a heuristic to detect and properly mark EFI system partitions
when re-using pre-existing partitions.

PR 55378: do not assume RAW_PART to be either 2 or 3

First try to bring evbarm installation closer to current reality.

Fix typo.

PR install/54582: allow MD code to disable on-disk presence verification
of "real" disklabels. Auto-enable this (at run time) when there is no other
partitioning scheme but disklabel configured.
Hard

PR install/54582: allow MD code to disable on-disk presence verification
of "real" disklabels. Auto-enable this (at run time) when there is no other
partitioning scheme but disklabel configured.
Hard-coded enable this for x68k to allow using kernel based translations
for native Human68k partitions.

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Provide some documentation for macros / defines used in the machine
dependent backend parts of sysinst.