[http_client] setHost: true should not prevent a default "Host" header

[aleclarson]

• Version: v9.8.0
• Platform: N/A
• Subsystem: N/A

node/lib/_http_client.js

Line 141 in 27ba6e2

var setHost = (options.setHost === undefined);

This should be options.setHost !== false so I can do the following:

https.request({
  setHost: opts.host !== false
}, cb)

Currently, I have to do the following:

let config = {}
if (opts.host === false) {
  config.setHost = false
}
https.request(config, cb)

In other words, setting setHost to true causes the "Host" header to not be set to a default value. This is confusing behavior.