I've attached an updated debdiff with more commentary about the fix.
The TLDR is that the CLI still supports the "blacklist" syntax in addition to the blocklist syntax at newer Ceph releases, but the output is always "blocklist". If we want, I can cherry-picking the entire upstream commit related to the syntax change, but a more minimal change seems more appropriate for an SRU (the upstream change seems to also change detection of elements in the block/black-list).
I've attached an updated debdiff with more commentary about the fix.
The TLDR is that the CLI still supports the "blacklist" syntax in addition to the blocklist syntax at newer Ceph releases, but the output is always "blocklist". If we want, I can cherry-picking the entire upstream commit related to the syntax change, but a more minimal change seems more appropriate for an SRU (the upstream change seems to also change detection of elements in the block/black-list).