+piwik_host: Host of your website in Piwik (without http:// or https://)
+piwik_site_id: ID of your website in Piwik
+piwik_enabled: Enable Piwik
+demo_mode_enabled: "Enable demo mode? (Only used for the public wallabag demo)"
+demo_mode_username: "Demo user"
+share_public: Allow public URL for entries
+download_images_enabled: Download images locally
+restricted_access: Enable authentication for paywalled websites
+api_user_registration: Enable user to be registered using the API
+store_article_headers: Enable if wallabag stores HTTP headers for each article
+shaarli_share_origin_url: Enable sharing origin url to Shaarli, if the service is enabled