Bug 26310: (QA follow-up) koha-conf-site.xml.in tweaks

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>

debian/templates/koha-conf-site.xml.in

@@ -361,6 +361,8 @@ __END_SRU_PUBLICSERVER__
 
      <!-- See https://metacpan.org/pod/Search::Elasticsearch#cxn_pool -->
      <cxn_pool>Static</cxn_pool>
+     <!-- See https://metacpan.org/pod/Search::Elasticsearch#trace_to -->
+     <!-- <trace_to>Stderr</trace_to> -->
  </elasticsearch>
  <!-- Uncomment the following line if you want to override the Elasticsearch default index settings -->
  <!-- <elasticsearch_index_config>__KOHA_CONF_DIR__/searchengine/elasticsearch/index_config.yaml</elasticsearch_index_config> -->