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TODO

For the future

 Ok, this is what I wanna do with Curl. Please tell me what you think, and
 please don't hesitate to contribute and send me patches that improve this
 product! (Yes, you may add things not mentioned here, these are just a
 few teasers...)

 * Make sure the low-level interface works. highlevel.c should basically be
   possible to write using that interface. Document the low-level interface

 * Add asynchronous name resolving, as this enables full timeout support for
   fork() systems.

 * Move non-URL related functions that are used by both the lib and the curl
   application to a separate "portability lib".

 * Add support for other languages than C. C++ and perl comes to mind. Python?

 * Improve the -K config file parser (the parameter following the flag should
   be possible to get specified *exactly* as it is done on a shell command
   line).

 * rtsp:// support -- "Real Time Streaming Protocol" (RFC 2326)

 * "Content-Encoding: compress/gzip/zlib"

   HTTP 1.1 clearly defines how to get and decode compressed documents. There
   is the zlib that is pretty good at decompressing stuff. This work was
   started in October 1999 but halted again since it proved more work than we
   thought. It is still a good idea to implement though.

 * Authentication: NTLM. It would be cool to support that MS crap called NTLM
   authentication. MS proxies and servers sometime require that. Since that
   protocol is a proprietary one, it involves reverse engineering and network
   sniffing. This should however be a library-based functionality. There are a
   few different efforts "out there" to make open source HTTP clients support
   this and it should be possible to take advantage of other people's hard
   work.

 * RFC2617 compliance, "Digest Access Authentication"
   A valid test page seem to exist at:
    http://hopf.math.nwu.edu/testpage/digest/
   And some friendly person's server source code is available at
    http://hopf.math.nwu.edu/digestauth/index.html

   Then there's the Apache mod_digest source code too of course.  It seems as
   if Netscape doesn't support this, and not many servers do. Although this is
   a lot better authentication method than the more common "Basic". Basic
   sends the password in cleartext over the network, this "Digest" method uses
   a challange-response protocol which increases security quite a lot.

 * Multiple Proxies?
   Is there anyone that actually uses serial-proxies? I mean, send CONNECT to
   the first proxy to connect to the second proxy to which you send CONNECT to
   connect to the remote host (or even more iterations). Is there anyone
   wanting curl to support it? (Not that it would be hard, just confusing...)

 * Other proxies
   Ftp-kind proxy, Socks5, whatever kind of proxies are there?

 * IPv6 Awareness and support
   Where ever it would fit.  configure search for v6-versions of a few
   functions and then use them instead is of course the first thing to do...
   RFC 2428 "FTP Extensions for IPv6 and NATs" will be interesting. PORT
   should be replaced with EPRT for IPv6, and EPSV instead of PASV.

 * SSL for more protocols, like SSL-FTP...
   (http://search.ietf.org/internet-drafts/draft-murray-auth-ftp-ssl-05.txt)

 * HTTP POST resume using Range:

 * Make curl capable of verifying the server's certificate when connecting
   with HTTPS://.