DNS : recurse for ptr records only if recursion is desired and configured #20412
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Description
This PR checks that the DNS request for the PTR has rd set (RecursionDesired) and we have recursors configured before calling the handleRecurse function.
Fixes:
Testing & Reproduction steps
Issue with calling handleRecurse if not neeed:
recursorsconfigureddig -p 8600 -x 127.0.0.3 @localhostIssue with lack of handling of the
rdflag:recursors = ["1.1.1.1"]configureddig -p 8600-x 1.1.1.1 @localhost +norecurseone.one.one.one.Links
Fixes: #20413
PR Checklist