[svn-r23601] Bring revisions #23341 - 23597 from trunk to revise_chunks.

h5committtested.

tools/h5diff/ph5diff_main.c

@@ -275,6 +275,9 @@ void h5diff_exit(int status)
     if(g_Parallel)
         MPI_Finalize();
 
-    exit(status);
+    /* Always exit(0), since MPI implementations do weird stuff when they
+     *  receive a non-zero exit value. - QAK
+     */
+    exit(0);
 }