[mod] use cache in _match_language function to speed up searx start time significantly
[mod] use cache in _match_language function to speed up searx start time significantly

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