mod_bookmarks: Fix traceback on attempt to convert invalid bookmark Found by accidentally publishing {urn:xmpp:bookmarks:0}conference instead of :1 due to testing this earlier for the blocking. By the principle of garbage in, garbage out, just generate a bookmark from the item id / JID and carry on with a warning.

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