setcookie() minor BC break - fixes issue #67736

Hi, This is a minor BC break, but still a BC break, so worth discussing on this ML. When a second setcookie() is done with the same name, a warning is emitted, because the ietf rfc 6265 says it *should* only send one Set-Cookie header per name. This is fine when display_errors is set to off. When it's set to on, the warning prevents the header from being added because "headers already sent" (which is the minor BC break, as current PHP just sends 2 Set-Cookie headers with the same name). So, should it be merged? What should be done to comply with the ietf rfc 6265? PR: https://github.com/php/php-src/pull/795/ PHP issue: https://bugs.php.net/bug.php?id=67736 Regards, *Florian Margaine*