This is "the glue fix". It changes the additional data lookup
algorithm to more closely follow RFC1035, so that root servers will provide a more complete set of name server glue addresses in ccTLD referral responses. For non-referral responses, the server no longer uses glue as additional data. For referral responses, the servers now looks for glue A/AAAA/A6 RRs in the zone where the NS RRs reside, even in the case where this is different from the zone where the A/AAAA/A6 RRs would have resided had they been authoritative data. A6 chains included as additional info may not yet fully follow these rules.
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309. [bug] When sending a referral, the server did not look
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for name server addresses as glue in the zone
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holding the NS RRset in the case where this zone
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was not the same as the one where it looked for
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name server addresses as authoritative data.
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308. [bug] Treat a SOA record not at top of zone as an error
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when loading a zone. (RT #154)
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