Add option to disable UNIX domain sockets

[sindresorhus]

https://github.com/sindresorhus/got/blob/main/documentation/tips.md#unix-domain-sockets

It's a niche feature and have heard that some teams have their own custom code to prevent it, so it makes sense to have the ability to turn it off in Got.

I suggest:

• Add option to turn off support for UNIX domain sockets. Make it false by default.
• In Got v13 (next major release), change it to be true by default.

Open questions:

• Should a Unix socket be able to redirect to HTTP?

[TommyDew42]

Haha, I'll pick up this one!
So when the setting is turned to false, the following won't work?

got('unix:/var/run/docker.sock:/containers/json');

[sindresorhus]

@TommyDew42 Correct. Also the http: version, per the docs.