implemented sending media type on token request (and others)

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

de.srsoftware.http/src/main/java/de/srsoftware/http/PathHandler.java

@@ -178,6 +178,7 @@ public abstract class PathHandler implements HttpHandler {
 			if (o instanceof List<?> list) o = new JSONArray(list);
 			if (o instanceof Map<?, ?> map) o = new JSONObject(map);
 			if (o instanceof Error<?> error) o = error.json();
+			if (o instanceof JSONObject) ex.getResponseHeaders().add(CONTENT_TYPE, JSON);
 			return sendContent(ex, status, o.toString().getBytes(UTF_8));
 		}
 

de.srsoftware.oidc.backend/src/main/java/de/srsoftware/oidc/backend/UserController.java

@@ -21,7 +21,6 @@ import jakarta.mail.*;
 import jakarta.mail.internet.*;
 import java.io.IOException;
 import java.time.Duration;
-import java.util.Comparator;
 import java.util.Map;
 import java.util.Optional;
 import java.util.Set;