Fix that auth-zone does not start the wait timer without checking
if the wait timer has already been started.
(the code is part of the previous commit).
- Tentative fix for permission denied on IPv6 address on FreeBSD.
- Fix that auth-zone master reply with current SOA serial does not
stop scan of masters for an updated zone.
+ - Fix that auth-zone does not start the wait timer without checking
+ if the wait timer has already been started.
21 June 2018: Wouter
- #4108: systemd reload hang fix.
