Llama support has long since bit-rotted, isn't well tested and should be removed.
Remove all user-facing Llama configuration options
Added Henry's text as an item under "incompatible changes", which is the most visible place for such stuff even if it's not expected to break anything.
I amended the wording of various "Llama is obsolete" notes and ripped out more obsolete text as well.
The doc changes are mixed in with other release note updates under: