s3: add errors if requests are signed by no authentication is setup

fix https://github.com/chrislusf/seaweedfs/issues/2075

weed/s3api/s3api_object_handlers.go

@@ -62,6 +62,12 @@ func (s3a *S3ApiServer) PutObjectHandler(w http.ResponseWriter, r *http.Request)
 			writeErrorResponse(w, s3ErrCode, r.URL)
 			return
 		}
+	} else {
+		rAuthType := getRequestAuthType(r)
+		if authTypeAnonymous != rAuthType {
+			writeErrorResponse(w, s3err.ErrAuthNotSetup, r.URL)
+			return
+		}
 	}
 	defer dataReader.Close()