ROADMAP: 2017 cleanup

intended to serve as a guideline for others for information, feedback and

possible participation.

HTTP/2

------

Improve performance. Measurements and tests have shown that in several cases

doing transfers over HTTP/2 can be notably slower than the same transfer done

over HTTP/1. Some of that difference can be attributed the inefficient window

size handling currently in use but there are probably more to be learned and

worked on to optimize this.

QUIC

----

implemented. This, to allow other projects to benefit from the work and to

thus broaden the interest and chance of others to participate.

TLS 1.3

-------

The new version of the TLS protocol is in the pipeline and will soon start to

get used out in the wild. It offers some new interesting features and will

need the TLS libraries to adapt and quite likely provide additional or

modified APIs. libcurl needs to adapt accordingly.

HTTP cookies

------------

How to find services for specific domains/hosts.

HTTPS to proxy

--------------

To avoid network traffic to/from the proxy getting snooped on. There's a git

branch in the public git repository for this that we need to make sure works

for all TLS backends and then merge!

curl_formadd()

--------------

make sure there's an easy handle passed in to `curl_formadd()`,

`curl_formget()` and `curl_formfree()` by adding replacement functions and

deprecating the old ones to allow custom mallocs and more

deprecating the old ones to allow custom mallocs and more.

Or perhaps even better: revamp the formpost API completely while we're at it

and making something that is easier to use and understand:

 https://github.com/curl/curl/wiki/formpost-API-redesigned

Third-party SASL

----------------

2. curl -h output (considered overwhelming to users)

3. we have > 170 command line options, is there a way to redo things to

3. we have > 200 command line options, is there a way to redo things to

   simplify or improve the situation as we are likely to keep adding

   features/options in the future too

4. docs (considered "bad" by users but how do we make it better?)

  - split up curl.1

5. authentication framework (consider merging HTTP and SASL authentication to

4. authentication framework (consider merging HTTP and SASL authentication to

   give one API for protocols to call)

6. Perform some of the clean up from the TODO document, removing old

5. Perform some of the clean up from the TODO document, removing old

   definitions and such like that are currently earmarked to be removed years

   ago