Comment 2 for bug 1181836

I have found that mpi communication is faster with mpich2 (as compared to open mpi) in a couple of systems I have worked with (for example the HP Proliant DL980). But this varies from architecture to architecture, so it will be nice to have both versions (i.e. open-mpi and mpich2). If this is an issue, I can just build the mpich2 version of mpb-mpi on my own (when I need an mpich2 version).

In any case, it will be good to clearly state that the current mpb-mpi in the repo is an open-mpi version and NOT an mpich version i.e. fix the "parallel (mpich) version" label.