Merged revisions 83393,83396,83398,83405,83408 via svnmerge from

Merged revisions 83393,83396,83398,83405,83408 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r83393 | georg.brandl | 2010-08-01 10:35:29 +0200 (So, 01 Aug 2010) | 1 line

  #1690103: fix initial namespace for code run with trace.main().
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  r83396 | georg.brandl | 2010-08-01 10:52:32 +0200 (So, 01 Aug 2010) | 1 line

  #4810: document "--" option separator in timeit help.
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  r83398 | georg.brandl | 2010-08-01 11:06:34 +0200 (So, 01 Aug 2010) | 1 line

  #8826: the "expires" attribute value is a date string with spaces, but apparently not all user-agents put it in quotes.  Handle that as a special case.
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  r83405 | georg.brandl | 2010-08-01 16:38:17 +0200 (So, 01 Aug 2010) | 1 line

  #4943: do not try to include drive letters (and colons) when looking for a probably module name.
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  r83408 | georg.brandl | 2010-08-01 17:30:56 +0200 (So, 01 Aug 2010) | 1 line

  #5551: symbolic links never can be mount points.  Fixes the fix for #1713.
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