all reviewed.

just one comment:
It is noticeable that the `-gpfs` feature is not reflected in reverse dependencies `versionsuffix`, and only affects some of the builds; 
I don't know what's the good solution to that, but let's keep an eye on this, because using the --enable-gpfs isn't all roses (always):
http://hdf-forum.184993.n3.nabble.com/HDF5-and-GFPS-optimizations-tt4026429.html#a4026431