Merged revisions 75143 via svnmerge from

Merged revisions 75143 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r75143 | philip.jenvey | 2009-09-29 12:10:15 -0700 (Tue, 29 Sep 2009) | 5 lines

  #5329: fix os.popen* regression from 2.5: don't execute commands as a sequence
  through the shell. also document the correct subprocess replacement for this
  case
  patch from Jean-Paul Calderone and Jani Hakala
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