`Host` header is not properly rewritten upon 3xx redirect

[Nathan Rajlich]

Ex:

const fetch = require('@zeit/fetch')(require('node-fetch'))
const url = 'https://github.com/paulkernfeld/node-headless/tarball/master'

async function main() {
  const res = await fetch(url, {
    headers: {
      'User-Agent': 'ace'
    }
  })
  console.log(res)
}

main().catch(err => {
  console.error(err);
  process.exit(1);
});

[Nathan Rajlich]

This was fixed by vercel/fetch-cached-dns@f524bae.