TYPO3 13 only accepts uploads whose extension is in textfile_ext,
mediafile_ext or miscfile_ext (security.system.enforceAllowedFileExtensions),
so the favicon.ico and site.webmanifest of a realfavicongenerator set were
rejected ("Resource consistency check failed"). Both are appended to
miscfile_ext in additional.php, which is deployed with the code;
settings.php, which production leads, stays untouched.
Co-Authored-By: Claude Opus 5.5 <[email protected]>