[enh] allow morty proxy without hmac key
[enh] allow morty proxy without hmac key

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