Improve ERR_INVALID_CHAR error info

[gengjiawen]

Is your feature request related to a problem? Please describe.
Recently, I have debug a error with http header

(node:17863) UnhandledPromiseRejectionWarning: TypeError [ERR_INVALID_CHAR]: Invalid character in header content ["cookie"]
    at ClientRequest.setHeader (_http_outgoing.js:458:3)
    at new ClientRequest (_http_client.js:221:14)
    at Object.request (http.js:44:10)

I take a very long time to find the invalid character (the root cause is because I put \n in the string end, so it failed).

Describe the solution you'd like
The error provide more information

Describe alternatives you've considered
Hopefully we can change something here to return more info

node/lib/_http_common.js

Lines 227 to 230 in ba565a3

	function checkInvalidHeaderChar(val) {
	return headerCharRegex.test(val);
	}

[rosaxxny]

I'll look into this - thanks.

[targos]

The PR in #28846 stalled and was closed. Should we keep this issue open @gengjiawen ?

[gengjiawen]

The PR in #28846 stalled and was closed. Should we keep this issue open @gengjiawen ?

Yes

[TokugawaTakeshi]

Has somewhere allowed characters list been posted?