Here's the same patch updated for libcurl 7.16.1.

Adam D. Moss wrote:
> Hi!
>
> A few weeks ago I reported this issue with a really long block
> in multi-mode:
> http://curl.haxx.se/mail/lib-2007-01/0160.html
>
> Well, here's a first cut at a patch. It doesn't make the whole
> proxy connect phase nonblocking, but it removes the potentially
> long block where the proxy routinely doesn't reply to the CONNECT
> for ages until it establishes a connect-through to the real remote host.
>
> The patch isn't cleaned-up or extensively tested (well, it
> passes all of the usual unit tests) but I'm submitting this rough
> version for feedback.
>
> Cheers,
> --Adam