set wallet

[chenyu1990]

	var addr string
	if len(btc.walletName) > 0 {
		addr = fmt.Sprintf("%s%s:%d/wallet/%s", schema, cfg.Host, cfg.Port, btc.walletName)
	} else {
		addr = fmt.Sprintf("%s%s:%d", schema, cfg.Host, cfg.Port)
	}