-
Use a zone's 'type' field instead of the value of its DNS_ZONEOPT_MIRROR option for checking whether it is a mirror zone. This makes said zone option and its associated helper function, dns_zone_mirror(), redundant, so remove them. Remove a check specific to mirror zones from named_zone_reusable() since another check in that function ensures that changing a zone's type prevents it from being reused during reconfiguration.
2cb9e8a0