v5.0.x: Update v5.0.x PRTE submodule to OMPI-specific fork

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "prrte"]
 	path = 3rd-party/prrte
-	url = ../../openpmix/prrte
+	url = ../../open-mpi/prrte
 	branch = v3.0
 [submodule "openpmix"]
 	path = 3rd-party/openpmix

docs/installing-open-mpi/packagers.rst

@@ -17,6 +17,14 @@ binary Open MPI packages should limit themselves solely to Open MPI
 artifacts.  Specifically: ensure to configure and build Open MPI
 against external installations of these required packages.
 
+.. note:: It should be noted that Open MPI |ompi_series| may include
+          an Open MPI-specific version of the PRRTE software package.
+          This may include post-release commits from the upstream
+          PRRTE repository, and/or include Open MPI-specific commits.
+          Care will need to be taken to ensure that downstream Open
+          MPI packages include functionality and bug fixes that are
+          included in the Open MPI distribution tarballs.
+
 Packagers may therefore wish to configure Open MPI with something like
 the following:
 

docs/installing-open-mpi/required-support-libraries.rst

@@ -108,14 +108,26 @@ system.
   * This library is optional in some environments. See below.
   * **Minimum version required:** |prte_min_version|
 
-    .. note:: While the minimum version of PRRTE will *work*, it may
-              still have bugs and/or have less functionality as
-              compared to later versions.  For example, if you build
-              and run with |prte_min_version|, you will not get a
-              fully-populated ``mpirun(1)`` man page.
+    .. important:: It should be noted that Open MPI |ompi_series| may
+                   include an Open MPI-specific version of the PRRTE
+                   software package.  This may include post-release
+                   commits from the upstream PRRTE repository, and/or
+                   include Open MPI-specific commits.  As such, the
+                   PRRTE minimum version |prte_min_version| may not
+                   actually include all bug fixes and functionality
+                   that is included in the PRRTE that is embedded in
+                   official Open MPI distributions.
+
+    .. note:: Additionally, while the minimum version of PRRTE will
+              *work*, it may still have bugs and/or have less
+              functionality as compared to later versions.  For
+              example, if you build and run with |prte_min_version|,
+              you will not get a fully-populated ``mpirun(1)`` man
+              page.
 
               The Open MPI community generally recomends using the
-              latest available version of PRRTE unless there is a
+              latest available version of PRRTE and/or the PRRTE
+              bundled in Open MPI distributions unless there is a
               specific reason not to.
 
   * **Version embedded in Open MPI distribution:**

docs/launching-apps/pmix-and-prrte.rst

@@ -66,3 +66,11 @@ nodes.
 Open MPI uses PRRTE to deal with the practical issues of the back-end
 run-time environment such as launching, monitoring, killing, and
 reaping remote processes.
+
+.. note:: The version of PRRTE bundled in the Open MPI |ompi_series|
+          may not be an official release of the upstream PRRTE
+          software project.  Instead, it may include commits from the
+          upstream PRRTE repository that were created after an
+          official release, and/or may contain Open MPI-specific
+          commits that were never included in any official upstream
+          PRRTE release.