CtdlRegisterSessionHook(ical_session_startup, EVT_START, PRIO_START + 1);
CtdlRegisterSessionHook(ical_session_shutdown, EVT_STOP, PRIO_STOP + 80);
CtdlRegisterFixedOutputHook("text/calendar", ical_fixed_output);
CtdlRegisterSessionHook(ical_session_startup, EVT_START, PRIO_START + 1);
CtdlRegisterSessionHook(ical_session_shutdown, EVT_STOP, PRIO_STOP + 80);
CtdlRegisterFixedOutputHook("text/calendar", ical_fixed_output);