DOCSP-19595 Change Stream Improvement (#799) (#821)

* DOCSP-19595 Connection content on change streams

* DOCSP-19595 Updates text for change stream connections

* DOCSP-19595 Fixes, per Joe

Author: kennethdyer

source/changeStreams.txt

@@ -46,6 +46,21 @@ Change stream is available for :doc:`replica sets <replication>` and
 deployments which employ MongoDB's
 :ref:`encryption-at-rest<encrypted-storage-engine>` feature.
 
+Connect
+--------
+
+Connections for a change stream can either use DNS seed lists
+with the ``+srv`` connection option or by listing the servers individually
+in the connection string.
+
+If the driver loses the connection to a change stream or the connection goes
+down, it attempts to reestablish a connection to the change stream through
+another node in the cluster that has a matching 
+:ref:`read preference <connections-read-preference>`. If the driver cannot find
+a node with the correct read preference, it throws an exception.
+
+For more information, see :ref:`Connection String URI Format <mongodb-uri>`.
+
 .. _changeStreams-watch-deployment:
 
 Watch a Collection, Database, or Deployment