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

[BIND 10 Development]

#2749: kill io_utilities.h or make it safe
-------------------------------------+-------------------------------------
            Reporter:  jinmei        |                        Owner:  muks
                Type:  defect        |                       Status:
            Priority:  medium        |  reviewing
           Component:  Unclassified  |                    Milestone:
            Keywords:                |  Sprint-20131015
           Sensitive:  0             |                   Resolution:
         Sub-Project:  Core          |                 CVSS Scoring:
Estimated Difficulty:  3             |              Defect Severity:  N/A
         Total Hours:  0             |  Feature Depending on Ticket:
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
-------------------------------------+-------------------------------------

Comment (by muks):

 The change looks fine. We could use `&srvid.at(8)` (which would throw if
 it was out of bounds) instead of `&srvid[8]`, but I guess for this use-
 case it's unnecessary as multiple checks are done in this codepath.

-- 
Ticket URL: <http://bind10.isc.org/ticket/2749#comment:17>
BIND 10 Development <http://bind10.isc.org>
BIND 10 Development