Update C++ examples to say that Open MPI no longer builds the MPI C++

bindings by default.  Fix a typo in README, and add a bullet to news
about the MPI C++ bindings.

This commit was SVN r27948.

NEWS

@@ -54,6 +54,8 @@ included in the vX.Y.Z section and be denoted as:
 Trunk (not on release branches yet)
 -----------------------------------
 
+- Do not build the MPI C++ bindings by default.  They must be enabled
+  via --enable-mpi-cxx.
 - Adding a new parallel I/O component and multiple new frameworks to 
   support parallel I/O operations.
 - ErrMgr framework redesigned to better support fault tolerance development

README

@@ -1078,7 +1078,7 @@ MPI FUNCTIONALITY
   Enable building the C++ MPI bindings.  The MPI C++ bindings were
   deprecated in MPI-2.2 and deleted in MPI-3.0.  Open MPI no longer
   builds its C++ bindings by default.  It is likely that the C++
-  binding will be removed from Open MPI at some point in the future.
+  bindings will be removed from Open MPI at some point in the future.
 
   Note that disabling building the C++ bindings does *not* disable all
   C++ checks during configure.

examples/hello_cxx.cc

@@ -6,6 +6,13 @@
 //
 // Sample MPI "hello world" application in C++
 //
+// NOTE: The MPI C++ bindings were deprecated in MPI-2.2 and removed
+// from the standard in MPI-3.  Open MPI still provides C++ MPI
+// bindings, but they are no longer built by default (and may be
+// removed in a future version of Open MPI).  You must
+// --enable-mpi-cxx when configuring Open MPI to enable the MPI C++
+// bindings.
+//
 
 #include "mpi.h"
 #include <iostream>

examples/ring_cxx.cc

@@ -6,6 +6,13 @@
 //
 // Simple ring test program
 //
+// NOTE: The MPI C++ bindings were deprecated in MPI-2.2 and removed
+// from the standard in MPI-3.  Open MPI still provides C++ MPI
+// bindings, but they are no longer built by default (and may be
+// removed in a future version of Open MPI).  You must
+// --enable-mpi-cxx when configuring Open MPI to enable the MPI C++
+// bindings.
+//
 
 #include "mpi.h"
 #include <iostream>