sort_default: "relevance", /* "relevance", "title:1", "date:0", "date:1" */
query_width: 50, /* 5..50 */
perpage_default: 20, /* 10, 20, 30, 50 */
+ lang: "en", /* "en", "de", "da" */
pazpar2_url: "/pazpar2/search.pz2", /* URL */
service_proxy_url: "/service-proxy/", /* URL */