ohader authored Sep 07, 2020 and Benni Mack committed Sep 07, 2020

HTTP responses having a status code not in 200-299 are basically
still responses. In order to allow general response handling
ResponseError is dropped in favor of AjaxResponse.

Besides that `AjaxResponse.dereference()` has been introduced which
allows to forward relevant data (status, headers, body) in events or
broadcast messages to other `window` instances or frames.

Resolves: #92222
Releases: master, 10.4
Change-Id: I3ac986980fe53bb528046f58bc19392744122ee7
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65625


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Richard Haeser <richard@richardhaeser.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Richard Haeser <richard@richardhaeser.com>
Reviewed-by: Benni Mack <benni@typo3.org>