update runtime docs re: intel mpi 2017 & fortran

darshan-runtime/doc/darshan-runtime.txt

@@ -449,8 +449,9 @@ method has been briefly tested using both GNU and Intel compilers.
 [NOTE]
 ====
 Darshan is only known to work with C and C++ executables generated by the
-Intel MPI suite.  Darshan will not produce instrumentation for Fortran
-executables.  For more details please check this Intel forum discussion:
+Intel MPI suite in versions prior to the 2017 version -- Darshan will not
+produce instrumentation for Fortran executables in these earlier versions (pre-2017).
+For more details on this issue please check this Intel forum discussion:
 
 http://software.intel.com/en-us/forums/showthread.php?t=103447&o=a&s=lr
 ====