Allow http1 for frontend HTTPS2 as well (backend always did).

build_number

@@ -1 +1 @@
-770
+771

frontend/server/server.js

@@ -40,7 +40,7 @@ function bootstrap() {
 	/* Start HTTP/S server */
 	const listener = async (req, res) => { try{await _handleRequest(req, res);} catch(e){error.error(e.stack?e.stack.toString():e.toString()); _sendError(req,res,500,e);} }
 	const options = conf.ssl ? {key: fs.readFileSync(conf.sslKeyFile), cert: fs.readFileSync(conf.sslCertFile)} : null;
-	const httpd = options && (!conf.forceHTTP1) ? http2.createSecureServer(options, listener) : options ? https.createServer(options, listener) : http.createServer(listener); // create server for http2 or http1 based on configurations
+	const httpd = options && (!conf.forceHTTP1) ? http2.createSecureServer({...options, allowHTTP1: true}, listener) : options ? https.createServer(options, listener) : http.createServer(listener); // create server for http2 or http1 based on configurations
 	const hostinterface = os.platform!="darwin"?(conf.host||"::"):"::";	// Mac won't let app bind to lower ports unless it listens to the wildcard host
 	httpd.setTimeout(conf.timeout);
 	httpd.listen(conf.port, hostinterface);