Add a set of system tests which check the contents of the AUTHORITY section for signed, insecure delegation responses constructed from CNAME records and wildcards, both for zones using NSEC and NSEC3.
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ns1 is the root server.
ns2 and ns5 are both authoritative servers.
ans3 is a mock authoritative server that can return various broken
responses.
ans4 is a mock authoritative server that can return CNAME or DNAME
responses of arbitrary size in arbitrary order.
ns7 is the resolver under test.