Merged revisions 84909-84913 via svnmerge from

Merged revisions 84909-84913 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r84909 | antoine.pitrou | 2010-09-20 00:46:05 +0200 (lun., 20 sept. 2010) | 3 lines

  Try to fix test_subprocess on "x86 debian parallel 3.x" buildbot
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  r84910 | antoine.pitrou | 2010-09-20 01:06:53 +0200 (lun., 20 sept. 2010) | 3 lines

  Try to make signal-sending tests in test_subprocess more robust on slow machines
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  r84911 | antoine.pitrou | 2010-09-20 01:28:30 +0200 (lun., 20 sept. 2010) | 3 lines

  Make error more explicit in test_finalize_with_trace
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  r84912 | antoine.pitrou | 2010-09-20 02:12:19 +0200 (lun., 20 sept. 2010) | 3 lines

  Try to fix buildbot failure (#9902)
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  r84913 | antoine.pitrou | 2010-09-20 03:33:21 +0200 (lun., 20 sept. 2010) | 3 lines

  Try a more robust implementation of _kill_process
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