Blocked revisions 67307 via svnmerge

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  r67307 | amaury.forgeotdarc | 2008-11-20 17:34:31 -0600 (Thu, 20 Nov 2008) | 9 lines

  Fixed issue #4233.
  Changed semantic of _fileio.FileIO's close()  method on file objects with closefd=False.
  The file descriptor is still kept open but the file object behaves like a closed file.
  The FileIO  object also got a new readonly attribute closefd.

  Approved by Barry

  Backport of r67106 from the py3k branch
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