NOTIFY delayed 1s after DDNS or XFR.

This does not big harm on not-frequently updated zones, NOTIFY is simply delayed. This helps on frequently updated (DDNS or [AI]XFR) zones - NOTIFY is not sent more often than once a second.

merged

mentioned in commit 25f345e8

@lpeltan I don't think this will work as you expect. Do you want this?

zone_events_schedule_at(zone, ZONE_EVENT_NOTIFY, 0, ZONE_EVENT_NOTIFY, time(NULL) + 1);