Merged revisions 83918 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r83918 | antoine.pitrou | 2010-08-10 00:38:19 +0200 (mar., 10 août 2010) | 5 lines

  Issue #3757: thread-local objects now support cyclic garbage collection.
  Thread-local objects involved in reference cycles will be deallocated
  timely by the cyclic GC, even if the underlying thread is still running.
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