Merged revisions 68312 via svnmerge from

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  r68312 | mark.dickinson | 2009-01-04 20:19:41 +0000 (Sun, 04 Jan 2009) | 4 lines

  It's wrong to use AC_REPLACE_FUNCS for hypot, since there's no longer any
  Python/hypot.c replacement file.  Use AC_CHECK_FUNCS instead.  This change
  should be backported to 2.6 and 3.0.
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