(DOCS-11186): Clarify .pem file behavior for kmip.clientCertificateFile (#2196)

Author: jeff-allen-mongo

source/reference/configuration-options.txt

@@ -2910,10 +2910,12 @@ Key Management Configuration Options
 
    *Type*: string
 
+   Path to the ``.pem`` file used to authenticate MongoDB to the KMIP
+   server. The specified ``.pem`` file must contain both the TLS/SSL
+   certificate and key. 
 
-   String containing the path to the client certificate used for
-   authenticating MongoDB to the KMIP server. Requires that a
-   :setting:`security.kmip.serverName` be provided.
+   To use this setting, you must also specify the
+   :setting:`security.kmip.serverName` setting.
 
    .. note::
 

source/reference/program/mongod.txt

@@ -3307,9 +3307,12 @@ Encryption Key Management Options
 
 .. option:: --kmipClientCertificateFile <string>
 
-   String containing the path to the client certificate used for
-   authenticating MongoDB to the KMIP server. Requires that a
-   :option:`--kmipServerName` be provided.
+   Path to the ``.pem`` file used to authenticate MongoDB to the KMIP
+   server. The specified ``.pem`` file must contain both the TLS/SSL
+   certificate and key. 
+   
+   To use this option, you must also specify the
+   :option:`--kmipServerName` option.
 
    .. note::