Just to underscore how we treat each other in this project. Nothing new
really, but could be useful for newcomers and outsiders to see our
values.

Reported-by: bemoody
Bug: https://github.com/bagder/curl/issues/325

Advise that WinSSL in versions <= XP will not be able to connect to
servers that no longer support the legacy handshakes and algorithms used
by those versions, and to use an alternate backend like OpenSSL instead.

Bug: https://github.com/bagder/curl/issues/253


Reported-by: zenden2k <zenden2k@gmail.com>

... in commit curl-7_43_0-18-g570076e

Using this fixed format for example descriptions, we can generate a
better list on the web site.

s/curret/current/

* use SSL/TLS where available
* follow permanent redirects

use \fI-style instead of .BR for references

and a conversion to markdown. Removed the lib/README.* files. The idea
being to move toward having INTERNALS as the one and only "book" of
internals documentation.

Added a TOC to top of the document.