[LTP] [PATCH v1] doc: introduce sphinx extlinks

[Petr Vorel]

Hi Andrea,

> Hi Andrea,

> NOTE: I still need to trigger doc build manually.

I'm sorry, this time it worked out of the box, great :).
I see green "passing" in the dashboard [1].

Although I still see "Could not add webhook for "linux-test-project". Please
connect your GitHub account." in project account [2].

Kind regards,
Petr

[1] https://readthedocs.org/dashboard/
[2] https://readthedocs.org/projects/linux-test-project/