BIND 10 #2301: Update ANY_SUB query to use LIKE clause efficiently

[BIND 10 Development]

#2301: Update ANY_SUB query to use LIKE clause efficiently
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            Reporter:  muks          |                        Owner:  muks
                Type:  enhancement   |                       Status:  new
            Priority:  medium        |                    Milestone:
           Component:  data source   |  Sprint-20121009
           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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 See bug #1756 and
 <https://lists.isc.org/pipermail/bind10-dev/2012-March/003167.html> for
 discussion.

 This fix was actually implemented in `trac1756`, but bug #1756 is going to
 be blocked for a while and there's no need to keep the ANY_SUB change
 pending. So I'm moving just that commit(s) to this bug/branch, and putting
 it to this sprint.

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Ticket URL: <http://bind10.isc.org/ticket/2301>
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