curl and proxy

[via Digitalmars-d-learn]

On Friday, 3 October 2014 at 04:57:28 UTC, AntonSotov wrote:
>   auto http = HTTP("dlang.org");
>   http.onReceive = (ubyte[] data)
>   {
>     writeln(cast(string) (data));
>     return data.length;
>   };
>   http.proxy = "192.168.111.111";
>   http.proxyPort = 1788;
>
>   WHAT HERE ?
>
>   http.perform();
>   //////////////////////////////////
> how to make Сurl authorize on a proxy.
> I specify proxyUser and proxyPassword?

I think there's currently no way. curl provides this as an option 
(CurlOption.proxyuserpwd):

     curl.set(CurlOption.proxyuserpwd, "myuser:mypasswd");

But unfortunately the `curl` struct is a private member of 
`HTTP`...