mod_bookmarks2: Remove wrong codepath (thanks luacheck!)

mod_conversejs: Switch dependency to mod_bookmarks2 Since mod_bookmarks2 now implements compatibility with the legacy PEP bookmarks storage method.

mod_pubsub_post: Document JSON to XML mapping capability

mod_rest: Fix nested message stanzas in XEP-0297 containers It's all a bit awkward because it doesn't normally use the whole schema directly, but rather checks which stanza type is used and picks out that property as a schema. Which also prevents references from working.

mod_rest: Fixup internal schema references for correctness With JSON Pointer support in util.datamapper, it is now possible to use the schema file as-is without the fixups mod_rest does.

mod_bookmarks2: Remove obsolete comment

mod_bookmarks2: Advertise XEP-0049 support In the case mod_private isn’t loaded, some clients (like poezio) won’t even attempt to use Private XML Storage unless this feature is advertised. This is on the domain JID and not on the account JID!

mod_bookmarks2: Use constants for namespaces

mod_pep_atom_categories: Add a module to index categories in Atom entries A new node is created for each category, named category-<the category>, which contains a list of all node/item tuples having said category as a tag.

mod_bookmarks2: Finally add the #compat-pep feature!