BIND 10 #2110: redefine in-memory zone finder (wildcard)

[BIND 10 Development]

#2110: redefine in-memory zone finder (wildcard)
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                   Reporter:         |                 Owner:  UnAssigned
  jinmei                             |                Status:  reviewing
                       Type:  task   |             Milestone:
                   Priority:         |  Sprint-20120918
  medium                             |            Resolution:
                  Component:  data   |             Sensitive:  0
  source                             |           Sub-Project:  DNS
                   Keywords:         |  Estimated Difficulty:  5
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
  scalable inmemory                  |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Changes (by jelte):

 * owner:  jelte => UnAssigned
 * status:  assigned => reviewing


Comment:

 done and done!

 Ready for review; I based it on #2109 (obviously), and the first commit is
 simply a merge of master (mostly to get #2151).

 The one controversial thing is that i don't actually create the wildcard
 substitution name, and I hope I'm not something obvious here, but it
 seemed more efficient to use the Name given to find() for that (since if
 the result is a wildcard, that should be the name).

 One half-related minor change, I added RRsig support to the test helper
 function textToRRset().

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Ticket URL: <http://bind10.isc.org/ticket/2110#comment:7>
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