plugin XEP-0060: add_managed_node now do strict matching by default:

`add_managed_node` now match node when they are exactly the same by default, but if the
new `strict_match` argument is set to `False`, the old behaviour of matching all node
which start with the given `node` argument is used.

rel 475

libervia/backend/plugins/plugin_pubsub_cache.py

@@ -81,6 +81,7 @@ class PubsubCache:
         self.host.trigger.add("XEP-0060_getItems", self._get_items_trigger)
         self._p.add_managed_node(
             "",
+            strict_match=False,
             items_cb=self.on_items_event,
             delete_cb=self.on_delete_event,
             purge_db=self.on_purge_event,