Update HTTP/2 server settings after `.listen()`

[szmarczak]

Is your feature request related to a problem? Please describe.

Currently it is possible to create an HTTP/2 in the following way:

const server = http2.createSecureServer({
	settings: {
		maxConcurrentStreams: 1000
	},
	key,
	cert
});

Let's assume you're having a server and it detected it's low on resources. Limiting maxConcurrentStreams could have a positive impact. Unfortunately it's not possible at the moment.

Describe the solution you'd like

server.updateSettings({
	maxConcurrentStreams: 100
});

Describe alternatives you've considered

None yet.

[szmarczak]

A very sketchy workaround looks like this:

	const kOptions = Object.getOwnPropertySymbols(server).find(x => x.toString() === 'Symbol(options)');
	server[kOptions].settings = {maxConcurrentStreams: 100};

[Vboivin]

@ZYSzys I'll take this issue, if nobody is working on it