fetchx

Add some extra options to fetch

add timeout

let url = 'http://httpbin.org/delay/10'
fetchx(url, {timeout:3000})
    .catch(e => {
        assert.equal(e, 'timeout')
    })

change url's protocol and host

let url = 'https://no-such-host.com/status/200'
fetchx(url, {forceServer: 'http://httpbin.org'})
    .then(resp => {
        assert.equal(resp.status, 200)
        assert.equal(resp.url, 'http://httpbin.org')
    })

provide fallback servers

let url = 'https://no-such-host.com/status/200'
fetchx(url, {fallbackServers: ['http://another-no-such-host.com', 'http://httpbin.org']})
    .then(resp => {
        assert.equal(resp.status, 200)
        assert.equal(resp.url, 'http://httpbin.org/status/200')
    })