Add support for passing socket info through to SERVER superglobal

[Qard]

I've added optional support for passing through local and remote socket information to the $_SERVER superglobal.

const request = new Request({
  url: 'http://example.com/index.php',
  socket: {
    localAddress: '127.0.0.1',
    localPort: 1234,
    remoteAddress: '123.123.123.123',
    remotePort: 54321
  }
})

Note that this is also designed to line up with the names on req.socket so you can pass that in as the socket info object too.

I've also improved the safety of the Request and Response constructors a bit, making it throw proper JS errors rather than using unwrap() or expect() which would kill the process on invalid inputs.

Also, argv is now required as it always should have been. 😅

[mcollina]

Why is this needed?

[Qard]

The main thing here is just fixing the HTTP_HOST issue you had--it will pull it from the headers properly now that the extra line is removed. But this also does some safety cleanup and ensures the rest of the socket info is set correctly.

These variables are probably not super important, but they are part of the CGI spec and should be present. I assume any IP-ban plugins would read from those, so we should probably have them.

[mcollina]

lgtm

[ShogunPanda]

Non blocking nit, LGTM!