TYPO3 Core

Creating auto redirects, if page slug is changed, has been extended
to add the target with LinkHandler 't3://' uri schema with #89327,
adding language argument '_language' to enforce the language for the
redirect, missing that that did not worked, which was solved through
adding '_language' argument handling in #96043.

As languge arguments '_language' and 'L' are ignored, if the provided
page uid is already the uid of the localized page, the parameter was
meaning less. Further this breaks language fallback handling, if the
localized page record is deleted.