BIND 10 #140: review: keep stderr open for child processes if -v is specified.

[BIND 10 Development]

#140: review: keep stderr open for child processes if -v is specified.
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 Reporter:  jinmei        |       Owner:  shane
     Type:  enhancement   |      Status:  new  
 Priority:  minor         |   Milestone:       
Component:  Unclassified  |    Keywords:       
Sensitive:  0             |  
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 Please review r1690.

 I often found it incovenient for debugging that stderr was closed in
 b10-xxx child processes.  This patch fixes this problem.

 (This diff contains an unrelated, minor editorial fix in a comment line)

 Giving this to Shane.

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Ticket URL: <https://bind10.isc.org/ticket/140>
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