[LTP] [PATCH 3/9] doc: Clarify API coverage and navigation

[Andrea Cervesato]

Hi Petr,

> Network tests are documented in :master:`testcases/network/README.md`.
> and delete the rest of the docs below ...

this is ok, but we need to translate that README into the documentation
at certain point. I don't think it's a good idea to keep README around
the project instead of using the main documentation folder.

--
Andrea Cervesato
SUSE QE Automation Engineer Linux
andrea.cervesato@suse.com