Improved the renderers encoding by using the template encoding or encoding specified in a property

lib/src/main/java/rife/render/DateTimeRfc2822.java

@@ -42,6 +42,6 @@ public class DateTimeRfc2822 implements ValueRenderer {
      */
     @Override
     public String render(Template template, String valueId, String differentiator) {
-        return ZonedDateTime.now().format(RenderUtils.RFC_2822_FORMATTER);
+        return template.getEncoder().encode(ZonedDateTime.now().format(RenderUtils.RFC_2822_FORMATTER));
     }
 }