WT-11496: fix not or not properly implemented setters in Saml::Service

I noticed that certain functions were not implemented in
`Saml::Service`. I added a proper implementation for
setNameIdPolicyAllowCreate (must set it to the provided
allowCreate argument and setAuthnContextComparison
(this function's implementation was missing entirely).

ReleaseNotes.html

@@ -52,6 +52,16 @@ <h2>Release 4.9.2 (TBD)</h2>
     <a href="https://redmine.webtoolkit.eu/issues/11433" target="_blank">Issue #11433</a>:
     fixed a regression in the treeview-dragdrop example where dropping a file on the folder view was not working anymore.
   </li>
+  <li>
+    <a href="https://redmine.webtoolkit.eu/issues/11496" target="_blank">Issue #11496</a>:
+    <a href="classWt_1_1Auth_1_1Saml_1_1Service.html">Saml::Service</a>:
+    added missing implementation for
+    <a
+      href="classWt_1_1Auth_1_1Saml_1_1Service.html#ae6be709a6ebc43302425da239622c05b">setAuthnContextComparison()</a>
+    and properly implemented
+    <a
+      href="classWt_1_1Auth_1_1Saml_1_1Service.html#aa5cca89e64b80cc66fcff8f64fda4360">setNameIdPolicyAllowCreate()</a>.
+  </li>
 </ul>
 
 <h2>Release 4.9.1 (January 20, 2023)</h2>

src/Wt/Auth/Saml/Service.C

@@ -309,14 +309,19 @@ void Service::setNameIdPolicyFormat(const std::string &format)
 
 void Service::setNameIdPolicyAllowCreate(bool allowCreate)
 {
-  nameIdPolicyAllowCreate_ = true;
+  nameIdPolicyAllowCreate_ = allowCreate;
 }
 
 void Service::setAuthnContextClassRef(const std::string &authnContextClassRef)
 {
   authnContextClassRef_ = authnContextClassRef;
 }
 
+void Service::setAuthnContextComparison(Wt::Auth::Saml::AuthnContextComparison comparison)
+{
+  authnContextComparison_ = comparison;
+}
+
 void Service::setSPEntityId(const std::string &entityID)
 {
   spEntityId_ = entityID;

src/Wt/Auth/Saml/Service.h

@@ -438,7 +438,7 @@ class WT_API Service {
 
   /*! \brief Sets the AllowCreate parameter for the name id policy in the authentication request.
    *
-   * This detauls to true.
+   * This defaults to true.
    *
    * \sa setNameIdPolicyFormat()
    */