Merged revisions 76432,76558 via svnmerge from

Merged revisions 76432,76558 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r76432 | mark.dickinson | 2009-11-20 19:30:22 +0000 (Fri, 20 Nov 2009) | 5 lines

  Issue #7272:  Add configure test to detect whether sem_open works
  properly, and use this to skip test_multiprocessing on platforms
  where sem_open raises a signal.  This should fix some FreeBSD buildbot
  failures for test_multiprocessing.
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  r76558 | mark.dickinson | 2009-11-28 10:44:20 +0000 (Sat, 28 Nov 2009) | 4 lines

  Issue #7272, continued:  don't re-use existing HAVE_BROKEN_POSIX_SEMAPHORES
  to indicate that semaphores aren't available;  define a new variable
  POSIX_SEMAPHORES_NOT_ENABLED instead.
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