chore: add quiet option to arguments

[IAGrig]

I tried to write a script with SpoofDPI and found out that it doesn't have a quiet option. There is a -banner option that does nothing (it's true in the config by default). It is implied that the quiet option disables any output.
Moreover, in the code I found the util.PrintSimpleInfo function which never executes because config.Banner is always true. Maybe we should think about it. Personally, I like the banner by default, but it seems a little strange that we never use util.PrintSimpleInfo. Maybe we should delete it.

[Ledorub]

There is a -banner option that does nothing (it's true in the config by default)

-banner=false

[IAGrig]

We don't have a quiet mode anyway. I hope the maintainer finds this useful.

[xvzc]

Maybe we should just remove --banner option. And --silent would be better for the naming of this option.

[Ledorub]

@xvzc, maybe we should mention somewhere in the docs how to set bool options to false. It confuses a lot of people, it seems.

[harryqt]

Maybe we should just remove --banner option. And --silent would be better for the naming of this option.

Sounds good to me.

[IAGrig]

Maybe we should just remove --banner option. And --silent would be better for the naming of this option.

I can do it, if it's the final decision.

[xvzc]

Maybe we should just remove --banner option. And --silent would be better for the naming of this option.

I can do it, if it's the final decision.

Yeah please go ahead

[IAGrig]

Well, it's worth deleting the unused config.PrintSimpleInfo function or are we planning to use it?

[xvzc]

You can just delete it