BIND 10 #520: xfrin/zonmgr should handle command responses appropriately

[BIND 10 Development]

#520: xfrin/zonmgr should handle command responses appropriately
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           Reporter:  jinmei         |                      Owner:
               Type:  defect         |                     Status:  new
           Priority:  major          |                  Milestone:  feature
          Component:  xfrin          |  backlog item
          Sensitive:  0              |                   Keywords:
Add Hours to Ticket:  0              |  Estimated Number of Hours:  0
        Total Hours:  0              |                  Billable?:  1
                                     |                  Internal?:  0
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 This is a continuation of #516.  We need to do a few more things on top of
 the urgent care fix:

  - We need more complete tests for the problem of #516.
  - xfrin and zonmgr should check the command response and take appropriate
    action, especially if the response indicates an error

 We should probably consider further extensions, too:
  - extend command spec to indicate whether it requests a response
    (see a review comment of #516)
  - making communication over CC channels asynchronous

 But these will even be beyond the scope of this follow up ticket.

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Ticket URL: <http://bind10.isc.org/ticket/520>
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