OpenLDAP upgrade notes for bookworm

The slapd 2.5 upgrade is likely to be messy for some users. Any feedback on the text would be welcome. The key points are:

• anyone using (at least) the mentioned modules (bdb, hdb, shell, ppolicy, argon2) will not have a working slapd service after upgrading
• mdb is fully supported in buster and bullseye, bdb/hdb users should migrate BEFORE upgrading to bookworm
• slapd.README.Debian has step-by-step instructions for fixing the upgrade for the known cases. (Is the filename the best pointer for this? Would a link to the live file on sources.debian.org be better?)

resolved all threads

added 1 commit

• f899299b - Apply 3 suggestion(s) to 1 file(s)

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added 10 commits

• f899299b...7aeed857 - 8 commits from branch ddp-team:master
• 5f077e4d - whats-new.dbk: update openldap
• b621472b - slapd 2.5 upgrade caveats

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Looks good to me. @JustinBRye, does your eye spot anything?

Looks good to me too.

added 8 commits

• b621472b...6de0e2a7 - 6 commits from branch ddp-team:master
• da337346 - whats-new.dbk: update openldap
• 2858f8c9 - slapd 2.5 upgrade caveats

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resolved all threads

added 7 commits

• 2858f8c9...aefcb54b - 5 commits from branch ddp-team:master
• d720081c - whats-new.dbk: update openldap
• 65d3614b - slapd 2.5 upgrade caveats

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enabled an automatic merge when the pipeline for 65d3614b succeeds

merged