osd: generate_backlog fixes
osd: generate_backlog fixes

Generate backlog records even if the object appears in the log if
the existing entry's prior_version in non-zero and isn't also
in the log.  This allows us to accurately generate the .have field
when we are building the missing map.

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph