BIND 10 #989: refactor reply_query_with_format_error() in xfrout

[BIND 10 Development]

#989: refactor reply_query_with_format_error() in xfrout
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            Reporter:  zzchen_pku    |                        Owner:
                Type:  enhancement   |                       Status:  new
            Priority:  minor         |                    Milestone:  New
           Component:  xfrout        |  Tasks
           Sensitive:  0             |                     Keywords:
         Sub-Project:  DNS           |              Defect Severity:  N/A
Estimated Difficulty:  0             |  Feature Depending on Ticket:
         Total Hours:  0             |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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 _reply_query_with_format_error() and _reply_query_with_error_rcode() have
 many duplicate code lines, and _reply_query_with_format_error() will never
 send response back to client.

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Ticket URL: <http://bind10.isc.org/ticket/989>
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