ceph/PendingReleaseNotes

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v0.68
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* 'ceph osd crush set <id> <weight> <loc..>' no longer adds the osd to the
specified location, as that's a job for 'ceph osd crush add'. It will
however continue to work just the same as long as the osd already exists
in the crush map.
* The OSD now enforces that class write methods cannot both mutate an
object and return data. The rbd.assign_bid method, the lone
offender, has been removed. This breaks compatibility with
pre-bobtail librbd clients by preventing them from creating new
images.