BIND 10 #1578: Update in memory ZoneFinder::find() for negative cases of NSEC3-signed zones

[BIND 10 Development]

#1578: Update in memory ZoneFinder::find() for negative cases of NSEC3-signed
zones
-------------------------------------+-------------------------------------
                   Reporter:         |                 Owner:  jinmei
  jinmei                             |                Status:  accepted
                       Type:  task   |             Milestone:
                   Priority:         |  Sprint-20120207
  critical                           |            Resolution:
                  Component:  data   |             Sensitive:  0
  source                             |           Sub-Project:  DNS
                   Keywords:         |  Estimated Difficulty:  5
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:  NSEC3  |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by jinmei):

 trac1578 is ready for review.

 It's based on the 1574b branch, and the first commit is to merge it
 (should be ignored for review).

 The main changes should be straightforward.  Test updates are
 relatively big, but it basically just confirms the expected result
 flags are set for various cases.

 There are some unrelated cleanups in the branch.  They are noted so
 in the commit logs.

 I don't plan to add a changelog entry for this update.

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Ticket URL: <http://bind10.isc.org/ticket/1578#comment:6>
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