Intitial implementation

Author: cicnavi

README.md

@@ -28,6 +28,7 @@ Currently, the following OIDF features are supported:
 * federation participation limiting based on Trust Marks
 * endpoint for issuing configuration entity statement (statement about itself)
 * fetch endpoint for issuing statements about subordinates (registered clients)
+* subordinate listing endpoint
 
 OIDF support is implemented using the underlying [SimpleSAMLphp OpenID library](https://github.com/simplesamlphp/openid).
 

UPGRADE.md

@@ -15,6 +15,7 @@ be fetched by RPs, and do the switch between "old" and "new" key pair when you f
   - Federation participation limiting based on Trust Marks
   - Endpoint for issuing configuration entity statement (statement about itself)
   - Fetch endpoint for issuing statements about subordinates (registered clients)
+  - (from v6.1) Subordinate listing endpoint
   - Clients can now be configured with new properties:
     - Entity Identifier
     - Supported OpenID Federation Registration Types

templates/clients/includes/form.twig

@@ -143,7 +143,9 @@
 
         <br>
         <h4>{{ 'OpenID Federation Related Properties'|trans }}</h4>
-
+            <span class="pure-form-message">
+                {% trans %}In order for an entity to participate in federation contexts (for example, to be listed as subordinate to this OP), it must have an Entity Identifier and Federation JWKS set. {% endtrans %}
+            </span>
         <label for="">{{ 'Is Federated'|trans }}</label>
         <label for="radio-option-federated-yes" class="pure-radio">
             <input type="radio"