Resolver prefetch eligibility edge case bug
According to ARM, the prefetch "eligibility" parameter is the smallest original TTL value that is accepted for a record to be eligible for prefetching, but in fact, when the original TTL value is equal to the eligibility value, the record is not treated as eligible for prefetching.
For example, with
prefetch 4 10; configuration in
tests/system/resolver/ns5 instance, prefetch doesn't work for the following records in
fetchall 10 TXT A short ttl fetchall 10 A 184.108.40.206 fetchall 10 AAAA ::1
Although the test passes because it fails to check that prefetch occurred.