[fix] bing character encoding - closes #760
[fix] bing character encoding - closes #760

PwnArt1st/searx,asciimoo/searx,dalf/searx,PwnArt1st/searx,jcherqui/searx,matejc/searx,asciimoo/searx,dalf/searx,matejc/searx,jibe-b/searx,potato/searx,jibe-b/searx,dalf/searx,misnyo/searx,jcherqui/searx,jcherqui/searx,PwnArt1st/searx,matejc/searx,potato/searx,misnyo/searx,asciimoo/searx,asciimoo/searx,dalf/searx,jcherqui/searx,PwnArt1st/searx,jibe-b/searx,misnyo/searx,potato/searx,misnyo/searx,potato/searx,matejc/searx,jibe-b/searx