BIND 10 #2749: kill io_utilities.h or make it safe

[BIND 10 Development]

#2749: kill io_utilities.h or make it safe
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            Reporter:  jinmei        |                        Owner:
                Type:  defect        |                       Status:  new
            Priority:  high          |                    Milestone:  Next-
           Component:  Unclassified  |  Sprint-Proposed
            Keywords:                |                   Resolution:
           Sensitive:  0             |                 CVSS Scoring:
         Sub-Project:  Core          |              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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Comment (by jinmei):

 Replying to [comment:1 vorner]:
 > This was always meant for tests only. Doesn't it say so in
 documentation?

 No, and, in fact, it's used by production (non test) DHCP code.  See,
 e.g. dhcp6_srv.cc.

 If it was meant to be used for tests only, I also suggest moving it
 to lib/util/unittests/ (I'd still suggest doing range check, too,
 though).

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Ticket URL: <http://bind10.isc.org/ticket/2749#comment:2>
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