The documentation you mention is not specific to a MIT KDC. It is also perfectly valid when using an active directory. You just need to set hadoop.http.authentication.kerberos.principal and hadoop.http.authentication.cookie.domain according to your specific settings.
The parameters are used to allow SPNEGO authentication when accessing some UIs of your cluster. Note that, in some cases, configuration on your browser might be required to use the tickets of your workstation. Example: