Show contents of manifest file when cm=false is passed

weed/server/volume_server_handlers_read.go

@@ -165,7 +165,7 @@ func (vs *VolumeServer) FaviconHandler(w http.ResponseWriter, r *http.Request) {
 }
 
 func (vs *VolumeServer) tryHandleChunkedFile(n *storage.Needle, fileName string, w http.ResponseWriter, r *http.Request) (processed bool) {
-	if !n.IsChunkedManifest() {
+	if !n.IsChunkedManifest() || r.URL.Query().Get("cm") == "false" {
 		return false
 	}