[PATCH] c-user: Use configuration option as section name

[Chris Johns]

On 06/11/2017 22:56, Sebastian Huber wrote:
> This makes it easier to find the documentation for a given configuration
> option.

Can you please generate the HTML and PDF so we can review what this looks like?

I have figured out indexes and I will sweep over the docs adding them soon. The
CONFIGURE_.... then can be added as indexes which puts them a few of clicks away
from the top level so I am not sure about this change. I tend to like the
English and not the exact constants.

The current labels could do with a clean up. There is way more info in the
headings than needs to be there. The docs clearly show the levels in the HTML
format and while not as clear in the PDF is it OK. This means for example:

Instantiate Classic API Initialization Task Table =>
Instantiate Classic Initialization Task Table

Specifying Classic API Initialization Task Entry Point =>
  Classic Initialization Task Entry Point

Specify Maximum POSIX API Threads => Maximum POSIX Threads

Classic API Initialization Tasks Table Configuration =>
Classic Initialization Tasks Table Configuration

etc.

Chris