BIND 10 #2759: apply check_zone before commiting DDNS changes

[BIND 10 Development]

#2759: apply check_zone before commiting DDNS changes
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                   Reporter:  jinmei  |                 Owner:
                       Type:  defect  |                Status:  new
                   Priority:  medium  |             Milestone:  New Tasks
                  Component:  DDNS    |              Keywords:
               CVSS Scoring:          |             Sensitive:  0
            Defect Severity:  N/A     |           Sub-Project:  DNS
Feature Depending on Ticket:          |  Estimated Difficulty:  0
        Add Hours to Ticket:  0       |           Total Hours:  0
                  Internal?:  0       |
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 and if check fails rejects the update request.  Just like we do in xfrin.
 (I'd consider this as a defect, as a DDNS request could make the zone
 invalid without this check)

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Ticket URL: <http://bind10.isc.org/ticket/2759>
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BIND 10 Development