Fix legacy URL tag.
Legacy <URL> block found. Please use <Node> instead.
diff --git a/collectd/files/backend/http.conf b/collectd/files/backend/http.conf
index 8787dbc..3bc1bc5 100644
--- a/collectd/files/backend/http.conf
+++ b/collectd/files/backend/http.conf
@@ -3,11 +3,12 @@
 </LoadPlugin>
 
 <Plugin write_http>
-  <URL "http://{{ backend.host }}:{{ backend.port }}">
+  <Node>
+    URL "http://{{ backend.host }}:{{ backend.port }}"
     Format "{{ backend.get('format', 'json')|upper }}"
     StoreRates {{ backend.get('store_rates', True)|lower }}
 {%- if backend.timeout is defined %}
     Timeout {{ backend.timeout }}
 {%- endif %}
-  </URL>
+  </Node>
 </Plugin>