changelog of the current development status, as one or more of these problems
may have been fixed since this was written!
+37. Having more than one connection to the same host when doing NTLM
+ authentication (with performs multiple "passes" and authenticates a
+ connection rather than a HTTP request), and particularly when using the
+ multi interface, there's a risk that libcurl will re-use a wrong connection
+ when doing the different passes in the NTLM negotiation and thus fail to
+ negotiate (in seemingly mysterious ways).
+
+36. --limit-rate (CURLOPT_MAX_SEND_SPEED_LARGE and
+ CURLOPT_MAX_RECV_SPEED_LARGE) are broken on Windows (since 7.16.0, but
+ that's when they were introduced as previous to that the limiting logic was
+ made in the application only and not in the library). This problem is easily
+ repeated and it takes a Windows person to fire up his/hers debugger in order
+ to fix. http://curl.haxx.se/bug/view.cgi?id=1603712
+
35. Both SOCKS5 and SOCKS4 proxy connections are done blocking, which is very
bad when used with the multi interface.