7942bc93e2
use a lame server configuration to force SERVFAILs instead of killing ns2. this prevents test failures that occurred due to a different behavior of the netowrking stack in windows.
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The test setup for the SERVFAIL ncache tests has a secure root.
ns1 is the root server.
ns2 is an authoritative server for the various test domains.
ns5 is a caching-only server, configured with the an incorrect trusted
key for the root. It is used for testing failure cases.