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@@ -11,4 +11,8 @@
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to expire.
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* When the rrset beging updated is an NS rrset, NSAS should be updated
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together.
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+* Share the NXDOMAIN info between different type queries. current implementation
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+ can only cache for the type that user quired, for example, if user query A
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+ record of a.example. and the server replied with NXDOMAIN, this should be
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+ cached for all the types queries of a.example.
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