http://localhost:9763/search.pz2?session=1&command=search&query=water
http://localhost:9763/search.pz2?session=2&command=settings&pz:name%5Bz3950.indexdata.com%2Fmarc%5D=1&pz:cclmap:term%5Bz3950.indexdata.com%2Fmarc%5D=u%3D1016&pz:elements%5Bz3950.indexdata.com%2Fmarc%5D=F
http://localhost:9763/search.pz2?session=2&command=search&query=water
-2 http://localhost:9763/search.pz2?session=1&command=bytarget&settings=1
+3 http://localhost:9763/search.pz2?session=1&command=bytarget&settings=1
http://localhost:9763/search.pz2?session=2&command=bytarget&settings=1