+5937. [cleanup] The dns_rdatalist_tordataset() and
+ dns_rdatalist_fromrdataset() functions can no
+ longer fail. Clean up their prototypes and error
+ handling, and that of other calling functions that
+ subsequently cannot fail, including
+ dns_message_setquerytsig(). [GL #3467]
+
5936. [bug] Don't enable serve-stale for lookups that error because
it is a duplicate query or a query that would be
dropped. [GL #2982]