(DOCSP-22423): Clarify startup instructions for redactClientLogData (#2101) (#2108)

* Clarify startup instructions for redactClientLogData

* copy review feedback

* final fixes

Author: davidhou17

source/reference/parameters.txt

@@ -1920,6 +1920,27 @@ Logging Parameters
    :doc:`/core/security-transport-encryption` to assist compliance with
    regulatory requirements.
 
+   To enable log redaction at startup, you can either:
+
+   - Start :binary:`mongod` with the
+     :option:`--redactClientLogData <mongod --redactClientLogData>` option: 
+
+     .. code-block:: javascript
+      
+        mongod --redactClientLogData
+      
+   - Set the :setting:`security.redactClientLogData` option in the 
+     :ref:`configuration file <configuration-options>`:
+
+     .. code-block:: yaml
+      
+        security: 
+           redactClientLogData: true
+           ...
+
+   You can't use the :option:`--setParameter <mongod --setParameter>` 
+   option to set :parameter:`redactClientLogData` at startup.
+   
    To enable log redaction on a running ``mongod`` or
    ``mongos``, use the following command: