HTTP auth: fix proxy Negotiate bug
If a proxy offers several Authentication schemes where NTLM and Negotiate are offered by the proxy and you tell libcurl not to use the Negotiate scheme then the request never returns when the proxy answers with its HTTP 407 reply. It is reproducible by the following steps: - Use a proxy that offers NTLM and Negotiate ( CURLOPT_PROXY and CURLOPT_PROXYPORT ) - Tell libcurl NOT to use Negotiate CURL_EASY_SETOPT(CURLOPT_PROXYAUTH, CURLAUTH_BASIC | CURLAUTH_DIGEST | CURLAUTH_NTLM ) - Start the request The call to CURL_EASY_PERFORM never returns. If you switch on debug logging you can see that libcurl issues a new request As soon as it received the 407 reply. Instead it should return and set the response code to 407. Bug: http://curl.haxx.se/mail/lib-2011-10/0323.html
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