Bugfix and usability improvements

client.js

@@ -315,6 +315,7 @@ write-data=${ path.resolve(config.instanceDirectory, instance) }\r\n
 	let instconf = {
 		"factorioPort": args.port || process.env.FACTORIOPORT || Math.floor(Math.random() * 65535),
 		"clientPort": args["rcon-port"] || process.env.RCONPORT || Math.floor(Math.random() * 65535),
+		"__comment_clientPassword": "This is the rcon password. Its also used for making an instanceID. Make sure its unique and not blank.",
 		"clientPassword": args["rcon-password"] || Math.random().toString(36).replace(/[^a-z]+/g, '').substr(0, 8),
 	}
 	console.log("Clusterio | Created instance with settings:")