added server-wide ARL

gets enabled only if --serverwide-arl is in the server arguments

public/js/app.js

@@ -73,6 +73,13 @@ socket.on('logged_out', function () {
 	$('#settings_picture').attr('src', `https://e-cdns-images.dzcdn.net/images/user/125x125-000000-80-0-0.jpg`)
 })
 
+socket.on('init_serverwideARL', function(arl){
+	if (localStorage.getItem('arl') === null) {
+		socket.emit('login', arl)
+		$('#login_input_arl').val(arl)
+	}
+})
+
 /* ===== App initialization ===== */
 function startApp() {
 	Downloads.init()