Merged revisions 72241 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

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  r72241 | gregory.p.smith | 2009-05-03 12:37:05 -0700 (Sun, 03 May 2009) | 3 lines

  Optimization: move RFC defined network constant construction out of
  the is_*() methods and into module private instances.
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