Change: Handle timezone-aware timestamps in acls

The django config now has USE_TZ=True, so the timestamps it produces
have timezone info. Because python does not allow comparing aware
timestamps with naive timestamps, the current time is also made aware.

Note that the per-day start and end times are not aware, but always
interpreted in the local timezone of the lock.

libs/module/DjangoBackendRfidAuth.py

@@ -507,8 +507,12 @@ def keys_hash(self):
         ).hexdigest()
 
     def acl_parse_rule(self, rule):
-        now = datetime.datetime.now()
+        now = datetime.datetime.now().astimezone()
 
+        # Note that after/before are expected to have a timezone
+        # specifier and are interpret as absolute timestamps, while
+        # time_start/time_end are just plain times and are interpreted
+        # in the local timezone (independent of the server timezone).
         after = rule.get("after", None)
         before = rule.get("before", None)
         weekdays = rule.get("weekdays", [])