Merged revisions 86383 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r86383 | antoine.pitrou | 2010-11-10 00:10:33 +0100 (mer., 10 nov. 2010) | 4 lines

  Issue #4471: Properly shutdown socket in IMAP.shutdown().  Patch by
  Lorenzo M. Catucci.
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diff --git a/Lib/test/test_imaplib.py b/Lib/test/test_imaplib.py
index a04ae65..00db29d 100644
--- a/Lib/test/test_imaplib.py
+++ b/Lib/test/test_imaplib.py
@@ -203,6 +203,7 @@
 
     def test_logout(self):
         rs = self.server.logout()
+        self.server = None
         self.assertEqual(rs[0], 'BYE')