Deprecation: #106969 - Deprecate User TSConfig auth.BE.redirectToURL 

See forge#106969

Description 

The User TSConfig option auth.BE.redirectToURL has been marked as deprecated and will be removed in TYPO3 v15.0.

Impact 

Using the deprecated User TSConfig option triggers a deprecation-level log entry and will stop working in TYPO3 v15.0.

Affected installations 

TYPO3 installations using the User TSConfig option auth.BE.redirectToURL are affected.

Migration 

If a redirect after a successful backend login is required, create a custom PSR-15 middleware to handle the redirection.