BIND 10 #380: Remove duplicate code from _setup_session and config_handler

[BIND 10 Development]

#380: Remove duplicate code from _setup_session and config_handler
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      Reporter:  zzchen_pku         |        Owner:  zzchen_pku
          Type:  enhancement        |       Status:  accepted  
      Priority:  major              |    Milestone:            
     Component:  secondary manager  |   Resolution:            
      Keywords:                     |    Sensitive:  0         
Estimatedhours:  0.0                |        Hours:  0         
      Billable:  1                  |   Totalhours:  0         
      Internal:  0                  |  
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Changes (by zzchen_pku):

  * status:  new => accepted


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Ticket URL: <https://bind10.isc.org/ticket/380#comment:1>
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