note about CAS based authenticator added

src/realms/yanel-website/data-repo/data/en/documentation/security/custom-identity-manager-custom-policy-manager.html

@@ -49,7 +49,7 @@ <h3>Configuration example (ac-policies-repository.xml)</h3>
 <br/><br/>
 <hr/>
 <h2>Custom WebAuthenticator</h2>
-<p>A custom WebAuthenticator can be necessary if custom HTTP headers shall be processed or some other custom webapp functionality needs to be implemented<br/></p>
+<p>A custom WebAuthenticator can be necessary if custom HTTP headers shall be processed or some other custom webapp authentication functionality needs to be implemented<br/></p>
 
 <p><strong>Instead of this:</strong></p>
 <p>org.wyona.yanel.servlet.security.impl.DefaultWebAuthenticatorImpl</p>
@@ -58,6 +58,10 @@ <h2>Custom WebAuthenticator</h2>
 <h3>Configuration example: realm.xml</h3>
 <p>
 </p><pre>&lt;web-authenticator class=&quot;foo.bar.yanel.servlet.security.impl.CompanyWebAuthenticatorImpl&quot;&gt;<br/>  &lt;bar:proxyRedirectURI xmlns:bar=&quot;http://www.company.com/wyona/1.0&quot;&gt;http://proxy.bar.foo&lt;/bar:proxyRedirectURI&gt;<br/>  &lt;bar:welcomeRedirectURI xmlns:bar=&quot;http://www.company.com/wyona/1.0&quot;&gt;/welcome.html&lt;/bar:welcomeRedirectURI&gt;<br/>  &lt;bar:lockedRedirectURI xmlns:bar=&quot;http://www.company.com/wyona/1.0&quot;&gt;/userLocked.html&lt;/bar:lockedRedirectURI&gt;<br/>  &lt;bar:expiredRedirectURI xmlns:bar=&quot;http://www.company.com/wyona/1.0&quot;&gt;/login/expired.html&lt;/bar:expiredRedirectURI&gt;<br/>&lt;/web-authenticator&gt;<br/></pre>
+
+<p>
+Yanel includes a <a href="http://www.jasig.org/cas">CAS</a> based <a href="https://en.wikipedia.org/wiki/Single_sign-on">SSO</a> web authenticator <code>org.wyona.yanel.servlet.security.impl.CASWebAuthenticatorImpl</code>, whereas a sample configuration can be found at <code>src/realms/yanel-website/realm.xml</code>.
+</p>
 </div>
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 </html>