gmx seems to need more client-side rate-limiting

Author: tobixen

caldav/compatibility_hints.py

@@ -1418,7 +1418,7 @@ def dotted_feature_set_list(self, compact=False):
     },
     'rate-limit': {
         'enable': True,
-        'interval': 1,
+        'interval': 2,
         'count': 1,
         'default_sleep': 4,
         'max_sleep': 30