+piwik_host: Host of your website in Piwik (without http:// ou https://)
+piwik_site_id: ID of your website in Piwik
+piwik_enabled: Enable Piwik
+demo_mode_enabled: "Enable demo mode ? (only used for the wallabag public demo)"
+demo_mode_username: "Demo user"
+share_public: Allow public url for entries