* OpenFOAM Configuration
  The main OpenFOAM settings are located in the parent etc/ directory.  The bash
  and csh shells are supported and to configure OpenFOAM source etc/bashrc or
  etc/cshrc respectively which source the following files in the config.sh or
  config.csh respectively:
  + =settings=: core settings
  + =aliases=: aliases for interactive shells
  + =unset=: sourced to clear as many OpenFOAM environment settings as possible
  + =mpi=: MPI communications library settings
  + =ensight=: application settings for EnSight
  + =paraview=: application settings for ParaView
  + =scotch=: application settings for compiling against scotch
  + =metis=: application settings for compiling against metis 5

  The config.*/example directories contains various example configuration files
  for the corresponding shell:
  + =compiler=: an example of fine tuning ThirdParty compiler settings
  + =openmpi=: an example of fine tuning openmpi settings for OpenFOAM
  + =paraview=: an example of chaining to the standard config/paraview with a
    different ParaView_VERSION
  + =prefs=: an example of supplying alternative site-defined settings