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

Move the 3rd-party/prrte Git submodule to point to the
https://github.com/open-mpi/prrte repo, and update the specific git
hash to point to the tip of the v3.0-ompi-v5.0.x branch.

This branch points to a few commits beyond the upstream PRTE v3.0.10
tag to include some bug fixes that came in after the v3.0.10 release.
The additional commit in the Open MPI fork simply changes the version
number in the 3rd-party/prte tree (and adds a few docs) to make it
clear that this is an Open MPI-specific version of PRTE, and is not
the same as any upstream / community PRTE release.

Signed-off-by: Jeff Squyres <jeff@squyres.com>

Author: jsquyres

.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

3rd-party/prrte

@@ -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/packagers.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/installing-open-mpi/required-support-libraries.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.