vchoi_fork

[svn-r9273] Purpose:

Port fix of parallel I/O mode confusion bug from the 1.6 tree to the 1.7 tree.


Description:

Collective I/O is not supported for point selections.  Thus when some
processes attempted I/O with point selections, and others without, some
attempted collective I/O while others did independent I/O.


Solution:

Arranged for all processes to compare notes before starting I/O, and
for all to use independent I/O if any one of them can't do collective
I/O.


Platforms tested:

copper
h5committested
eirene (parallel)

Misc. update: