BIND 10 #2048: configure check for pyexpat

[BIND 10 Development]

#2048: configure check for pyexpat
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                   Reporter:  jreed  |                 Owner:  UnAssigned
                       Type:  task   |                Status:  new
                   Priority:  low    |             Milestone:  New Tasks
                  Component:  build  |            Resolution:
  system                             |             Sensitive:  0
                   Keywords:         |           Sub-Project:  Core
            Defect Severity:  N/A    |  Estimated Difficulty:  2
Feature Depending on Ticket:         |           Total Hours:  0
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by naokikambe):

 !ElementTree uses expat. That's described in the code
 [http://hg.python.org/cpython/file/e044fa016c85/Lib/xml/etree/ElementTree.py
 ElementTree.py]:
 {{{#!python
 # Element structure builder for XML source data, based on the
 # <b>expat</b> parser.
 }}}
 Thanks.

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Ticket URL: <http://bind10.isc.org/ticket/2048#comment:3>
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