DOCS-14433 config.transactions read concern disallowed

Author: ianf-mongodb

source/includes/fact-5.0-non-transactional-config-reads.rst

@@ -0,0 +1,10 @@
+Starting in MongoDB 5.0, non-transaction reads are not allowed on 
+the :data:`config.transactions` collection with the following
+read concerns and options:
+
+- :readconcern:`"snapshot"`
+- :readconcern:`"majority"` and the 
+  :ref:`afterClusterTime<afterClusterTime>` option is set
+- When using a :driver:`MongoDB Driver </>`  
+  and :readconcern:`"majority"`
+  within a :ref:`causally consistent session<sessions>`

source/reference/config-database.txt

@@ -26,6 +26,8 @@ The collections in the ``config`` database support:
 Restrictions
 ------------
 
+.. include:: /includes/fact-5.0-non-transactional-config-reads.rst
+
 .. important:: The schema of the ``config`` database is
    *internal* and may change between releases of MongoDB. The
    ``config`` database is not a dependable API, and users should not
@@ -524,6 +526,8 @@ instance.
      the ``system.sessions`` collection into at least 1024 chunks and
      distributes the chunks uniformly across shards in the cluster.
 
+.. _config.transactions:
+
 .. data:: config.transactions
 
    The ``transactions`` collection stores records used to support

source/release-notes/5.0-compatibility.txt

@@ -153,6 +153,11 @@ Replica Sets
 Starting in MongoDB 5.0, :rsconf:`~members[n].secondaryDelaySecs`
 replaces ``slaveDelay``. This change is not backwards compatible.
 
+Non-transactional Reads on ``config.transactions``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. include:: /includes/fact-5.0-non-transactional-config-reads.rst
+
 Manual Oplog Writes
 ~~~~~~~~~~~~~~~~~~~
 

source/release-notes/5.0.txt

@@ -347,6 +347,11 @@ Starting in MongoDB 5.0, these database commands and
 Replica Sets
 ------------
 
+Non-transactional Reads on ``config.transactions``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. include:: /includes/fact-5.0-non-transactional-config-reads.rst
+
 ``hello`` Command
 ~~~~~~~~~~~~~~~~~