doap: Add XEP-0317: Hats See 76bb806cdd4b

usermanager: Fix traceback when checking admin status of host-only JIDs (fixes #1508)

mod_presence: Advertise support for Subscription Pre-Approval RFC 6121 §3.4 says: > If a server supports subscription pre-approvals, then it MUST > advertise the following stream feature during stream negotiation. The feature itself (#686) was added in f0e9e5bda415

MUC: Add initial hats support (broadcast only) Based on the currently-deferred XEP-0317. The protocol differs a little (because XEP-0317 is incomplete), therefore currently we use a custom namespace. The plan is to update and finish XEP-0317.

README: Update link to web chat At some point the web chat moved to /chat and then to this subdomain

Merge 0.11->trunk

MUC: Persist affiliation_data in new MUC format!

MUC: Persist affiliation_data in new MUC format!

MUC: Switch to new storage format by default Changing the default setting of `new_muc_storage_format` from false to true. The code supports reading both formats since 0.11, but servers with MUCs stored using the new format will not be able to downgrade to 0.10 or earlier. The new format is clearer (less nesting for the most commonly-accessed data), and combined with the new map-store methods, allows for some operations to become more efficient (such as finding out which MUCs on a service a given user is affiliated with).

MUC: Support for broadcasting unavailable presence for affiliated offline users Activated when muc#roomconfig_presencebroadcast includes the "none" role.