Merged revisions 76240 via svnmerge from

Merged revisions 76240 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r76240 | antoine.pitrou | 2009-11-13 17:29:04 +0100 (ven., 13 nov. 2009) | 6 lines

  Issue #6551: test_zipimport could import and then destroy some modules of
  the encodings package, which would make other tests fail further down
  the road because the internally cached encoders and decoders would point
  to empty global variables.
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