man: clarify fi_cancel as time bounded

fi_cancel should return within a bounded period of time,
i.e. it cannot block indefinitely. Some providers may need
to perform additional actions that may not be "immediate".

Based on OFIWG discussion on 9/2.
man: update fi_cancel completion

Better wording.

There are 2 operations of concern here.  The original request being
canceled and the cancel operation itself.
Merge pull request #7 from sayantansur/manpage-updates

man: clarify fi_cancel as time bounded
prov/psm: allow rebinding resources to ep

Signed-off-by: Jianxin Xiong <jianxin.xiong@intel.com>
prov/psm: give warning instead of returning error for src_addr check

Signed-off-by: Jianxin Xiong <jianxin.xiong@intel.com>
Merge remote branch 'upstream/master'
prov/psm: sync atomics along with RMA ops

Atomic ops are considered a special type of RMA read/write.

Signed-off-by: Jianxin Xiong <jianxin.xiong@intel.com>