Error using custom whois server

[vladtreny]

If we use a custom whois server, like, whois.biz

txt, err := c.Whois("excellentlife.biz", "whois.biz")

here will get a double query

https://github.com/likexian/whois/blob/da2a39f728fcd78812b314020428cb95e5b75d21/whois.go#L137

The first query will go to whois.biz and return valid data, but then instead of returning this valid response, it will query the default server and return error (biz server used in this library is unstable).

Should be something like that on #L137

result, err = c.rawQuery(domain, server, port)
if err != nil {
    return "", err
} else {
    return 
}

[likexian]

Hello @vladtreny I can't reproduce this. If the whois server return by whois.biz is the same as whois.biz, it will not doing a double query.

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