BIND 10 #2105: introduce node deleter of new RBTree

[BIND 10 Development]

#2105: introduce node deleter of new RBTree
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                   Reporter:         |                 Owner:  UnAssigned
  jinmei                             |                Status:  reviewing
                       Type:  task   |             Milestone:
                   Priority:         |  Sprint-20120731
  medium                             |            Resolution:
                  Component:  data   |             Sensitive:  0
  source                             |           Sub-Project:  DNS
                   Keywords:         |  Estimated Difficulty:  4
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
  scalable inmemory                  |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by jinmei):

 And I've noticed there are some 'rbtree', etc in the code.  If we
 choose to rename it now, that cleanup should be comprehensive.

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Ticket URL: <http://bind10.isc.org/ticket/2105#comment:8>
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