* Enable hdf5 build (including +mpi) on Windows
* This includes updates to hdf5 dependencies openssl (minor edit) and
bzip2 (more-extensive edits)
* Add binary-based installation of msmpi (this is currently the only
supported MPI implementation in Spack for Windows). Note that this
does not install to the Spack-specified prefix. This implementation
will be replaced with a source-based implementation
Co-authored-by: John Parent <john.parent@kitware.com>