1.Change base.Dial to base.DailContext.
2.Remove proxyDialer that was previously used to configure a
net.Dialer to route proxy.Dialer which will route the connections
through the proxy using the connections through a SOCKS proxy.
SOCKS proxies are now supported by configuring only http.Transport.Proxy,
and no longer require changing http.Transport.Dial.
Signed-off-by: HuanHuan Ye <logindaveye@gmail.com>
a57fd5488d