- Fixup rrset security updates overwriting 2181 trust status.

	- Fixup rrset security updates overwriting 2181 trust status.
	  This makes validated to be insecure data just as worthless as
	  nonvalidated data, and 2181 rules prevent cache overwrites to them.
	- Fix assertion fail on bogus key handling.
	- dnssec lameness detection works on first query at trust apex.
	- NS queries get proper cache and dnssec lameness treatment.
	- fixup compilation without pthreads on linux.
	- NS queries are done after every referral.
	  validator is used on those NS records (if anchors enabled).

git-svn-id: file:///svn/unbound/trunk@1185 be551aaa-1e26-0410-a405-d3ace91eadb9