don't include empty parameters in URLs
don't include empty parameters in URLs

samratcis/atk4,xepan/atk4,svisystem/atk4,atk4/atk4,atk4/atk4,atk4/atk4,samratcis/atk4,atk4/atk4,svisystem/atk4,xepan/atk4,svisystem/atk4,xepan/atk4,samratcis/atk4