DOCSP-46697: SRV record section (#186)

(cherry picked from commit 894e587)

Author: mcmorisi

source/connect/connection-targets.txt

@@ -9,7 +9,7 @@ Choose a Connection Target
    :values: reference
 
 .. meta::
-   :keywords: connection string, URI, server, settings, client, load balancing
+   :keywords: connection string, URI, server, settings, client, load balancing, srv, dns
 
 .. contents:: On this page
    :local:
@@ -151,6 +151,23 @@ option to ``True``. You can do this in two ways: by passing an argument to the
                 "directConnection=true")
          client = MongoClient(uri)
 
+DNS Service Discovery
+---------------------
+
+To use DNS service discovery to look up the DNS SRV record of the service you're connecting to,
+specify the SRV connection format in your connection string. Additionally, if you enable
+the SRV connection format, {+driver-short+} automatically re-scans for new hosts without
+having to change the client configuration.
+
+The following code shows a connection string that uses the SRV connection format:
+
+.. code-block:: python
+
+   uri = "mongodb+srv://<hostname>/"
+
+To learn more about the SRV connection format, see the :manual:`SRV Connection Format </reference/connection-string/#std-label-connections-dns-seedlist>`
+entry in the {+mdb-server+} manual.
+
 Troubleshooting
 ---------------