BIND 10 #1775: update in-memory getAdditional() to handle wildcard match for additional names

[BIND 10 Development]

#1775: update in-memory getAdditional() to handle wildcard match for additional
names
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            Reporter:  jinmei        |                        Owner:
                Type:  task          |                       Status:  new
            Priority:  high          |                    Milestone:  Next-
           Component:  Unclassified  |  Sprint-Proposed
           Sensitive:  0             |                     Keywords:
         Sub-Project:  DNS           |              Defect Severity:  N/A
Estimated Difficulty:  0             |  Feature Depending on Ticket:  auth
         Total Hours:  0             |  performance
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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 This one was deferred from #1608.  See the ticket.

 Also, ZoneFinderContextTest::getAdditionalDelegationWithWild() fails
 due to this issue.  With this task completed, the test should succeed
 and be re-enabled.

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Ticket URL: <http://bind10.isc.org/ticket/1775>
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BIND 10 Development