way to set proxyTimeout

[MaplerStory]

now can use the setHttpProxy method to set proxy for the client, but there is no way to pass the proxyTimeout option,

this._connection.connect({
			"port": server.port,
			"host": server.host,
			"localAddress": this._localAddress,
			"localPort": this._localPort,
			"httpProxy": this._httpProxy
		}