BIND 10 #2013: DDNS config and initial request handling

[BIND 10 Development]

#2013: DDNS config and initial request handling
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            Reporter:  jinmei        |                        Owner:
                Type:  task          |                       Status:  new
            Priority:  medium        |                    Milestone:
           Component:  DDNS          |  Sprint-20120612
           Sensitive:  0             |                     Keywords:
         Sub-Project:  DNS           |              Defect Severity:  N/A
Estimated Difficulty:  0             |  Feature Depending on Ticket:  DDNS
         Total Hours:  0             |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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 This is a continuation of #1458, but the implementation is
 pretty independent from the original trac1458 branch and has
 some amount of code, so I think it's more convenient if we
 give it a separate ticket (i.e., this one).

 Since it's essentially a part of the existing ticket of the sprint,
 I'm pushing this one to this current sprint.

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Ticket URL: <http://bind10.isc.org/ticket/2013>
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