Merged revisions 72213 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

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  r72213 | andrew.kuchling | 2009-05-02 15:17:28 -0400 (Sat, 02 May 2009) | 3 lines

  #1607951: Make mailbox.Maildir re-read the directories less frequently.
  This is done by recording the current time -1sec, and not re-reading unless
  the directory mod. times are >= the recorded time.
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