A tool to check the quality of a DNS zone

Changes for v4.7.3 - 2023-09-08

• Fixes
• Fixes a bug in test case BASIC01 that made tests of zones fail if, while walking the chain of delegations from the root to the zone under test, a name server returns a referral pointing to name servers for an intermediate zone which are all out-of-bailiwick and lacking glue. The bug was introduced in version v4.7.0 in release v2023.1. (#1282)
• Disable blacklisting for queries by NAMESERVER15 to prevent false errors and warnings (#1285)