mod_muc: add muc-private-message event This seems to be the one place handling MUC-PMs. This event is added so that plugins (such as muc_occupant_id) can edit them without having to redo the work.

return {
  _all = {
  },
  default = {
    ["exclude-tags"] = "mod_bosh,storage,SLOW";
  };
  bosh = {
    tags = "mod_bosh";
  };
  storage = {
    tags = "storage";
  };
}