A vulnerability was discovered in the processing of wildcard synthesized
NSEC records. While synthesis of NSEC records is allowed by RFC4592,
these synthesized owner names should not be used in the NSEC processing.
This does, however, happen in Unbound 1.6.7 and earlier versions.
(see https://unbound.net/downloads/CVE-2017-15105.txt)
Signed-off-by: Eric Luehrsen <ericluehrsen@hotmail.com>