DOCS-16280 Support Exhaust Cursors on mongos (#4901)

* DOCS-16280 Support Exhaust Cursors on mongos

* *

* JA feedback

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* Revert "*"

This reverts commit 4355501b1c270874e4f9937611c79ab17414fa4c.

Author: ajhuh-mdb

source/release-notes/7.1.txt

@@ -54,6 +54,15 @@ field and :data:`currentOp.locks` output:
 - ``DDLDatabase``
 - ``DDLCollection``
 
+Exhaust Cursors Enabled for Sharded Clusters
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Starting in MongoDB 7.1, :binary:`~bin.mongos` supports exhaust cursors 
+when a client's :ref:`getMore <manual-reference-commands-getMore>` request sets 
+the :ref:`exhaustAllowed <wire-msg-flags>`  flag. This can improve query 
+performance on sharded clusters when the client receives multiple replies 
+from the database server for a single request.
+
 Improved Index Builds
 ~~~~~~~~~~~~~~~~~~~~~