[fix] utils/searx.sh install settings - do not eval the template

The settings template in utils/templates/etc/searx/settings.yml
does not include any replacements (shell environment variables).

BTW: utils/filtron.sh & utils/lib.sh
  Add some more messages to installation procedures, to be more clear.

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

utils/searx.sh

@@ -621,7 +621,7 @@ install_settings() {
     fi
 
     mkdir -p "$(dirname "${SEARX_SETTINGS_PATH}")"
-    install_template \
+    install_template --no-eval \
         "${SEARX_SETTINGS_PATH}" \
         "${SERVICE_USER}" "${SERVICE_GROUP}"
     configure_searx