Merged revisions 87653-87655 via svnmerge from

Merged revisions 87653-87655 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r87653 | antoine.pitrou | 2011-01-02 23:06:53 +0100 (dim., 02 janv. 2011) | 3 lines

  Clarify behaviour of close() and shutdown() on sockets.
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  r87654 | antoine.pitrou | 2011-01-02 23:09:27 +0100 (dim., 02 janv. 2011) | 3 lines

  Add a shutdown() call in the server example.
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  r87655 | antoine.pitrou | 2011-01-02 23:12:22 +0100 (dim., 02 janv. 2011) | 3 lines

  Some nits.
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