cleanup

  Also see #12. According to bug #1556528, even the SOCKS5 connect code does

  not do it right: http://curl.haxx.se/bug/view.cgi?id=1556528,

33. Doing multi-pass HTTP authentication on a non-default port does not work.

  This happens because the multi-pass code abuses the redirect following code

  for doing multiple requests, and when we following redirects to an absolute

  URL we must use the newly specified port and not the one specified in the

  original URL. A proper fix to this would need to separate the negotiation

  "redirect" from an actual redirect.

32. (At least on Windows) If libcurl is built with c-ares and there's no DNS

  server configured in the system, the ares_init() call fails and thus

  curl_easy_init() fails as well. This causes weird effects for people who use

  numerical IP addresses only.

31. "curl-config --libs" will include details set in LDFLAGS when configure is

  run that might be needed only for building libcurl. Similarly, it might

  include options that perhaps aren't suitable both for static and dynamic

  linking. Further, curl-config --cflags suffers from the same effects with

  CFLAGS/CPPFLAGS.

  run that might be needed only for building libcurl. Further, curl-config

  --cflags suffers from the same effects with CFLAGS/CPPFLAGS.

30. You need to use -g to the command line tool in order to use RFC2732-style

  IPv6 numerical addresses in URLs.