command line tool deprecations

The name of the project didn't change and continued its development under the same name, with less developers. Libav is a new project, with a new name, and thus should just assume its fork status. Note that there is absolutely nothing wrong about forking when it's done properly.

Actually, this is from https://libav.org/about.html:

> Later we have learned that the FFmpeg founder, who owns the domain, still favors the now-demoted project leader. We of course respect his opinion, which convinced us to fork "properly" under the name Libav

There is no point in arguying here that Libav is the original project since your official page states that it's a fork.