Merged revisions 80484 via svnmerge from

Merged revisions 80484 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r80484 | antoine.pitrou | 2010-04-25 23:40:32 +0200 (dim., 25 avril 2010) | 6 lines

  Issue #2302: Fix a race condition in SocketServer.BaseServer.shutdown,
  where the method could block indefinitely if called just before the
  event loop started running.  This also fixes the occasional freezes
  witnessed in test_httpservers.
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