CALENDAR_TIMEZONE_MAP falsely requires CALENDAR_ACTIVE
https://sentry.fsmpi.rwth-aachen.de/protokollsystem/protokollsystem/issues/15/
KeyError: 'CALENDAR_TIMEZONE_MAP'
File "configproxy.py", line 920, in __getattr__
return self.data[key]
AttributeError:
(4 additional frame(s) were not displayed)
...
File "program/server.py", line 1739, in feed_appointments_ical
for key in config.CALENDAR_TIMEZONE_MAP:
AttributeError