minor javadoc updates

src/main/java/com/ibm/as400/access/AS400.java

@@ -1452,6 +1452,7 @@ public void changePassword(char[] oldPassword, char[] newPassword) throws AS400S
      Changes the user profile password.  The system name and user profile name need to be set prior to calling this method.
      @param  oldPassword  The old user profile password.
      @param  newPassword  The new user profile password.
+     @param  additionalAuthenticationFactor Additional authentication factor (or null if not providing one).
      @exception  AS400SecurityException  If a security or authority error occurs.
      @exception  IOException  If an error occurs while communicating with the system.
      **/