copy original content-type from remote response
copy original content-type from remote response

laher/imageproxy,zischwartz/imageproxy,runemadsen/imageproxy,willnorris/imageproxy,sevki/imageproxy,betabrand/imageproxy,willnorris/imageproxy,runemadsen/imageproxy,WatchBeam/imageproxy,Toubib/imageproxy,Hapara/imageproxy,victortrac/imageproxy,betabrand/imageproxy,victortrac/imageproxy,zischwartz/imageproxy,wojtekzw/imageproxy,therumpusroom/imageproxy,wojtekzw/imageproxy,WatchBeam/imageproxy,sevki/imageproxy,Toubib/imageproxy