message: note on RAJA support for MFEM v4.1
diff: @@ -571,6 +571,7 @@ The specific libraries and their options are:
  Options: OCCA_DIR, OCCA_OPT, OCCA_LIB.
  - RAJA, used when MFEM_USE_RAJA = YES.
  + Beginning with MFEM v4.1, only RAJA v0.10.0+ is supported.
  URL: https://github.com/LLNL/RAJA
  Options: RAJA_DIR, RAJA_OPT, RAJA_LIB.
  