Feature: #93011 - Authentication-related cookies are attached to PSR-7 Responses

Description

Cookies, used to keep the session identifiers for Frontend sessions and Backend user sessions, were previously added natively via PHP header() and setcookie() at the very beginning of the User Authentication workflow, although this did not allow for later-on manipulation of these HTTP response headers, as they were emitted directly via PHP when calling the native PHP functions.

TYPO3 now attaches the cookie information for the user session information to the PSR-7 Responses, by default in a PSR-15 middleware.

Impact

It is now possible to attach the cookies to a PSR-7 Response via $GLOBALS[BE_USER]->appendCookieToResponse(), which is especially handy in custom middlewares that have custom endpoints when using other PHP frameworks via the PSR-15 middleware stack.