Log Message:
Changes in 3.2:

* Added support for MPI-3.1 features including nonblocking collective I/O,
  address manipulation routines, thread-safety for MPI initialization,
  pre-init functionality, and new MPI_T routines to look up variables
  by name.

* Fortran 2008 bindings are enabled by default and fully supported.

* Added support for the Mellanox MXM InfiniBand interface.  (thanks
  to Mellanox for the code contribution).

* Added support for the Mellanox HCOLL interface for collectives.
  (thanks to Mellanox for the code contribution).

* Significant stability improvements to the MPICH/portals4
  implementation.

* Completely revamped RMA infrastructure including several
  scalability improvements, performance improvements, and bug fixes.

* Added experimental support for Open Fabrics Interfaces (OFI) version 1.0.0.
  https://github.com/ofiwg/libfabric (thanks to Intel for code contribution)

* The Myrinet MX network module, which had a life cyle from 1.1 till
  3.1.2, has now been deleted.

* Several other minor bug fixes, memory leak fixes, and code cleanup.