e117f36e48
We use url.ParseQuery to parse names-to-urls string, but it has side effect that unescape the string. If the initial-cluster string has ipv6 which contains `%25`, it will unescape it to `%` and make further url parse failed. Fix it by modifiying the parse process. Go1.4 doesn't support literal IPv6 address w/ zone in URI(https://github.com/golang/go/issues/6530), so we only enable tests in Go1.5+.