man: update a bunch of attribute-related man pages

Per discussion starting
http://www.open-mpi.org/community/lists/users/2014/12/26018.php, at
least note that OMPI does not allow adding or deleting attributes in
an attribute copy or delete callback (or any of its children) on the
same object on which the callback was invoked.
LSF expresses its affinity file in hwthreads and expects those to be used as cpus, so set things accordingly