Merged revisions 80392 via svnmerge from

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  r80392 | antoine.pitrou | 2010-04-23 01:33:02 +0200 (ven., 23 avril 2010) | 9 lines

  Issue #8108: Fix the unwrap() method of SSL objects when the socket has
  a non-infinite timeout.  Also make that method friendlier with applications
  wanting to continue using the socket in clear-text mode, by disabling
  OpenSSL's internal readahead.  Thanks to Darryl Miles for guidance.

  Issue #8108: test_ftplib's non-blocking SSL server now has proper handling
  of SSL shutdowns.
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