fix proper method on qr install

Author: Sorunome

www/qr.html

@@ -66,7 +66,7 @@ <h2>QR Generator</h2>
 	const url = form.elements["url"].value;
 	const buffer = newBuffer(1000);
 	bufferWriteRawString(buffer, "NPQR");
-	bufferWriteInt(buffer, 2);
+	bufferWriteInt(buffer, 3); // method = download pass
 	bufferWriteString(buffer, url);
 
 	const bytes = bufferFinalise(buffer);