message: Update config.hpp.in
diff: // Enable functionality based on the OCCA library.
  // #define MFEM_USE_OCCA
  -// Enable functionality based on the Memory Manager
  +// Enable MFEM's internal Memory Manager (needed e.g. for MFEM_USE_CUDA)
  // #define MFEM_USE_MM
  // Version of HYPRE used for building MFEM.
  