BIND 10 #2261: move data_sources category and flatten configuration

[BIND 10 Development]

#2261: move data_sources category and flatten configuration
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                   Reporter:  jreed  |                 Owner:
                       Type:  task   |                Status:  new
                   Priority:         |             Milestone:  New Tasks
  medium                             |            Resolution:
                  Component:  data   |             Sensitive:  0
  source                             |           Sub-Project:  DNS
                   Keywords:         |  Estimated Difficulty:  0
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by jinmei):

 I'm not sure if we want the abbreviation if we have a reasonable
 default that can be omitted.

 As for the second, see #2262.  I think we need design discussion first.

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Ticket URL: <http://bind10.isc.org/ticket/2261#comment:1>
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