fix for key cache lookup
fix for key cache lookup

git-svn-id: 606cd7bb7c4874b1f27fc28ef6a6d76dca18f877@2105 be551aaa-1e26-0410-a405-d3ace91eadb9

dnstap/unbound,dnstap/unbound,dnstap/unbound,dnstap/unbound