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5ab7e4a475
The sharing point for DNSSEC RR data used to be when it entered the cache, having been validated. After that queries requiring the KEY or DS records would share the cached values. There is a common case in dual-stack hosts that queries for A and AAAA records for the same domain are made simultaneously. If required keys were not in the cache, this would result in two requests being sent upstream for the same key data (and all the subsequent chain-of-trust queries.) Now we combine these requests and elide the duplicates, resulting in fewer queries upstream and better performance. To keep a better handle on what's going on, the "extra" logging mode has been modified to associate queries and answers for DNSSEC queries in the same way as ordinary queries. The requesting address and port have been removed from DNSSEC logging lines, since this is no longer strictly defined.