fixed discovery endpoint, closes mitreid-connect#1230

Author: jricher

openid-connect-server/src/main/java/org/mitre/discovery/web/DiscoveryEndpoint.java

@@ -35,6 +35,7 @@
 import org.mitre.openid.connect.view.HttpCodeView;
 import org.mitre.openid.connect.view.JsonEntityView;
 import org.mitre.openid.connect.web.DynamicClientRegistrationEndpoint;
+import org.mitre.openid.connect.web.EndSessionEndpoint;
 import org.mitre.openid.connect.web.JWKSetPublishingEndpoint;
 import org.mitre.openid.connect.web.UserInfoEndpoint;
 import org.slf4j.Logger;
@@ -310,7 +311,7 @@ OPTIONAL. JSON array containing a list of the JWS signing algorithms (alg values
 m.put("token_endpoint", baseUrl + "token");
 m.put("userinfo_endpoint", baseUrl + UserInfoEndpoint.URL);
 //check_session_iframe
-//end_session_endpoint
+m.put("end_session_endpoint", baseUrl + EndSessionEndpoint.URL);
 m.put("jwks_uri", baseUrl + JWKSetPublishingEndpoint.URL);
 m.put("registration_endpoint", baseUrl + DynamicClientRegistrationEndpoint.URL);
 m.put("scopes_supported", scopeService.toStrings(scopeService.getUnrestricted())); // these are the scopes that you can dynamically register for, which is what matters for discovery
@@ -368,7 +369,7 @@ OPTIONAL. JSON array containing a list of the JWS signing algorithms (alg values
 
 m.put("code_challenge_methods_supported", Lists.newArrayList(PKCEAlgorithm.plain.getName(), PKCEAlgorithm.S256.getName()));
 
-m.put("device_authorization_endpoint", DeviceEndpoint.URL);
+m.put("device_authorization_endpoint", baseUrl + DeviceEndpoint.URL);
 
 model.addAttribute(JsonEntityView.ENTITY, m);