DOCSP-16012 LDAP clarification (#2814)

* DOCSP-16012 LDAP clarification

* Fixes per Sarah

* Fixes per Sarah

* Fixes per Alex M

Author: kennethdyer

source/core/security-ldap-external.txt

@@ -83,13 +83,15 @@ configuration of LDAP authorization for your MongoDB deployment.
 Compatible Authentication Mechanism
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-The following authentication mechanisms are compatible with MongoDB LDAP
-authorization:
+MongoDB supports LDAP authorization with the following authentication methods:
 
 - :ref:`security-ldap`
 - :ref:`security-kerberos`
 - :ref:`security-auth-x509`
 
+With this configuration, MongoDB uses LDAP, X.509, or Kerberos 
+authorization to authenticate client connections.
+
 .. _ldap-connection-pool-behavior:
 
 Connection Pool
@@ -316,6 +318,10 @@ configuration file:
 
      - **NO**, unless client usernames require transformation into LDAP DNs.
 
+When you have configured LDAP authorization, restart :program:`mongod` or 
+:program:`mongos`. The server now uses LDAP authorization with 
+X.509, Kerberos, or LDAP to authenticate client connections.
+
 LDAP Query Template
 ~~~~~~~~~~~~~~~~~~~