BIND 10 #2210: support "reconfigure" command in the configurator thread

[BIND 10 Development]

#2210: support "reconfigure" command in the configurator thread
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                   Reporter:         |                 Owner:  jinmei
  jinmei                             |                Status:  reviewing
                       Type:  task   |             Milestone:
                   Priority:         |  Sprint-20121023
  medium                             |            Resolution:
                  Component:         |             Sensitive:  0
  b10-auth                           |           Sub-Project:  DNS
                   Keywords:         |  Estimated Difficulty:  5
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
  background zone loading            |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by jinmei):

 Replying to [comment:15 jelte]:

 The revised version looks okay for merge.

 > Updated to catch those three exceptions, though at least in theory
 DataSourceError should mostly be inconsistent data/connection problems,
 but may be a bug, and isc::Exception should be the other way around (in
 theory the datasources should not blindly raise any exception, but of
 course it can happen).

 Right, I think we need some better categorization in datasrc
 exceptions, at least one(s) for temporary failures or configuration
 errors and one(s) for rather suggesting possible internal bugs.
 But that's a topic of a separate ticket (and some will probably have
 to be handed in the new zone loader work).

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Ticket URL: <http://bind10.isc.org/ticket/2210#comment:16>
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