requestHTTP seems to have problems with IPv6 urls

[MartinNowak]

/++ dub.sdl:
dependency "vibe-d" version="~>0.8.3-alpha.4"
+/
import vibe.vibe;

void main()
{
    auto settings = new HTTPServerSettings;
    settings.port = 8080;
    settings.bindAddresses = ["::1"];
    listenHTTP(settings, (req, res) { res.writeBody("Hello, World!"); });

    runTask({
        auto resp = requestHTTP("http://[::1]:8080/");
        assert(resp.statusCode == 200, resp.toString);
    });
    runApplication();
}

Fails with HTTP/1.1 400 Bad Request.