BIND 10 #1743: support NSEC in in-memory datasource

[BIND 10 Development]

#1743: support NSEC in in-memory datasource
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            Reporter:  jreed         |                        Owner:
                Type:  defect        |                       Status:  new
            Priority:  major         |                    Milestone:  New
           Component:  data source   |  Tasks
           Sensitive:  0             |                     Keywords:
         Sub-Project:  DNS           |              Defect Severity:  N/A
Estimated Difficulty:  0             |  Feature Depending on Ticket:
         Total Hours:  0             |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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 NXDOMAIN result only returns RRSIG for the SOA, but no NSEC.

 (Additional task is lettuce test(s) -- open new tickets as needed.)

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Ticket URL: <http://bind10.isc.org/ticket/1743>
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BIND 10 Development