Add YARA repositories manually

[zaqes]

Would be nice if this could be included.
I guess I could just update the UPDATE_URL_SIGS with the URLs (?), but a command would be nice.

[Neo23x0]

That's YARA rule management; not necessarily a task of the scanner.
Furthermore, other YARA rule repos are often shit. They contain expensive rules or rules that trigger tons of FPs. So be careful using them.

[zaqes]

That's true!

So update the list in UPDATE_URL_SIGS would be the best way forward at the moment?