Update news in preparation for v5.0.0rc9.

Signed-off-by: Austen Lauria <awlauria@us.ibm.com>

Author: awlauria

docs/news/news-v5.0.x.rst

@@ -4,9 +4,9 @@ Open MPI v5.0.x series
 This file contains all the NEWS updates for the Open MPI v5.0.x
 series, in reverse chronological order.
 
-Open MPI version 5.0.0rc8
+Open MPI version 5.0.0rc9
 -------------------------
-:Date: 29 September 2022
+:Date: 21 October 2022
 
 .. admonition:: MPIR API has been removed
    :class: warning
@@ -40,38 +40,28 @@ Open MPI version 5.0.0rc8
       libraries, rather than linked into the Open MPI core libraries.
 
 
-- Changes since rc7:
-
-  - Switched to the PRRTe v3.0 branch.
-  - Many improvements and bugfixes to the one-sided ``UCX`` transport.
-  - Many improvements and bugfixes to ``MPI Sessions``.
-  - MPI-4: Initial implementations of ``MPI_COMM_TYPE_HW_GUIDED`` and ``MPI_COMM_TYPE_HW_GUIDED`` added.
-  - Fixes to singleton/MPI_COMM_SPAWN launching.
-  - Changed the mpirun command line option ``--stream-buffering`` to be an --mca option. It can now be enabled with
-    ``--mca ompi_stream_buffering X`` where X could be 0 for unbuffered, 1 for line buffered, or 2 for fully buffered.
-  - Github: Automatic labeler added to label pull requests with their
-    destination branch. Thanks to Joe Downs for the contribution.
-  - Fixed a deadlock in a one-sided ``RDMA`` function call. Thanks to @jotabf for the fix.
-  - Split out opal-core into two libraries. This will prevent unnecessary external dependencies from being
-    linked with mpirun and other Open MPI tools.
-  - The default atomics have been changed to be GCC, with C11 as a fallback. C11 atomics incurs sequential
-    memory ordering, which in most cases is not desired.
-  - Lots of updates to OpenMPI documentation.
-  - Fixed a bug where users could not build the ``OFI`` component as a DSO. Thanks to Moritz Kreutzer for the report.
-  - Fixed the MPI_Parrived C binding. Thanks to @jprotze for the report.
-  - Configure: Fix typo in CUDA checks. Thanks to Andreas Schwab for the fix.
-  - Fixed bugs when compiling Open MPI with the --enable-script-wrapper-compilers configure option.
-    Thanks to Julien Olivain for the fix.
-  - Include missing sys/stat.h in sharedfp_sm.c to fix a compile error on FreeBSD.
-    Thanks to Mosè Giordano for the fix.
-  - Fixed numerous typos throughout the code base. Thanks to @luzpaz for these fixes.
-  - Removed trailing whitespace from documentation. Thanks to @a-szegel for their
-    contribution.
+- Changes since rc8:
+
+  - Added new ``Accelerator`` gpu framework. ``CUDA`` specific code was replaced with
+    a generic framework that standardizes various device features such as copies or
+    pointer type detection. This allows for modularized implementation of various
+    devices such as the newly introduced ROCm Accelerator component. The redesign
+    also allows for Open MPI builds to be shipped with ``CUDA`` support enabled
+    without requiring ``CUDA`` libraries.
+  - Various bug fixes related to ``MPI Sessions``.
+  - autogen.pl: Fixed ifort support on OSX. Thanks to Tien Quang, NGUYEN
+    for providing the fix.
+  - Initial implementation of ``MPI_COMM_TYPE_HW_UNGUIDED`` for ``MPI_Comm_split_type``.
+  - Fixed a bug where ``MPI_Pack`` and ``MPI_Unpack`` external32 with long doubles
+    could fail. See #8918 for details.
+  - Updated MCA mutexes to use the Qthreads user-level-threading backend. Thanks
+    to Jan Ciesko for the contribution.
+  - Various other bug fixes and cleanups.
 
 - All other notable updates for v5.0.0:
 
-  - Updated PMIx to the ``v4.2`` branch - current hash: ``1f0b53f``.
-  - Updated PRRTE to the ``v3.0`` branch - current hash: ``30b3222``.
+  - Updated PMIx to the ``v4.2`` branch - current hash: ``dcc40a6``.
+  - Updated PRRTE to the ``v3.0`` branch - current hash: ``a89228a``.
 
   - New Features:
 
@@ -110,6 +100,7 @@ Open MPI version 5.0.0rc8
       ``MPI_Win_get_info()`` compliant to the standard.
     - Droped unknown/ignored info keys on communicators, files,
       and windows.
+    - Initial implementations of ``MPI_COMM_TYPE_HW_GUIDED`` and ``MPI_COMM_TYPE_HW_GUIDED`` added.
 
   - Transport updates and improvements
 
@@ -237,6 +228,8 @@ Open MPI version 5.0.0rc8
       Thanks to Yaz Saito for finding and fixing the bug.
     - Singleton ``MPI_Comm_spawn()`` support has been fixed.
     - PowerPC atomics: Force usage of ppc assembly by default.
+    - The default atomics have been changed to be GCC, with C11 as a fallback. C11 atomics incurs sequential
+      memory ordering, which in most cases is not desired.
     - Various datatype bugfixes and performance improvements.
     - Various pack/unpack bugfixes and performance improvements.
     - Various OSHMEM bugfixes and performance improvements.