BIND 10 #2915: update CacheConfig to support diff mode

[BIND 10 Development]

#2915: update CacheConfig to support diff mode
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            Reporter:  jinmei        |                        Owner:
                Type:  task          |                       Status:  new
            Priority:  medium        |                    Milestone:  Next-
           Component:  data source   |  Sprint-Proposed
            Keywords:                |                   Resolution:
           Sensitive:  0             |                 CVSS Scoring:
         Sub-Project:  DNS           |              Defect Severity:  N/A
Estimated Difficulty:  5             |  Feature Depending on Ticket:
         Total Hours:  0             |  shared memory data source
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Changes (by muks):

 * estimatedhours:  0 => 5


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Ticket URL: <http://bind10.isc.org/ticket/2915#comment:1>
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