ceasor

http_client_winhttp::send_request only handle the case when proxy.is_auto_discovery() return true.  So when we construct a web_proxy with uri, it will only set the proxy mode as user_provided_.  So send_request...

fix issue: The web_proxy doesn't work when set proxy with uri

1

http_client_winhttp::send_request only handle the case when proxy.is_auto_discovery() return true.  So when we construct a web_proxy with uri, it will only set the proxy mode as user_provided_.  So send_request...