Server - proxy - bypass rules

[sla100]

It seems to me that there is something wrong in bypass implemetation:

vite/packages/vite/src/node/server/middlewares/proxy.ts

Lines 118 to 132 in 9c808cd

	if (opts.bypass) {
	const bypassResult = opts.bypass(req, res, opts)
	if (typeof bypassResult === 'string') {
	req.url = bypassResult
	debug(`bypass: ${req.url} -> ${bypassResult}`)
	return next()
	} else if (isObject(bypassResult)) {
	Object.assign(options, bypassResult)
	debug(`bypass: ${req.url} use modified options: %O`, options)
	return next()
	} else if (bypassResult === false) {
	debug(`bypass: ${req.url} -> 404`)
	return res.end(404)
	}
	}

1. When you return object bypassResult are lost. Meybe return at line 127 are wrong?
2. When you return false the res.end at line 130 raise an error:

Internal server error: The "chunk" argument must be of type string or an instance of Buffer or Uint8Array. Received type number (404)
     at ServerResponse.end (node:_http_outgoing:977:5)

3. When you return true proxy has been used but type definitions do not allow true or boolean value:

vite/packages/vite/src/node/server/middlewares/proxy.ts

Lines 25 to 29 in 9c808cd

	bypass?: (
	req: http.IncomingMessage,
	res: http.ServerResponse,
	options: ProxyOptions
	) => void | null | undefined | false | string

[PengBoUESTC]

there is a PR about this question...
#10209
@patak-dev