+Changed the way PQF queries are encoded in SRU GET/POST. PQF search
+before: x-pquery=pqf . PQF search now: query=pqf&x-querytype=pqf . This
+makes the SRU request more conformant because the required query parameter
+is always present. PQF scan before: x-pScanClause=pqf . PQF scan now:
+scanClause=pqf&x-querytype=pqf .
+