[fix] update query params sanitization - closes #722
[fix] update query params sanitization - closes #722

jcherqui/searx,asciimoo/searx,asciimoo/searx,jcherqui/searx,dalf/searx,jcherqui/searx,jcherqui/searx,asciimoo/searx,dalf/searx,dalf/searx,dalf/searx,asciimoo/searx