Sanitize all files recursively at once
After migrating a 4.5 LTS to a 7.6 LTS some files do not fit the naming rules (e.g. utf8 is not allowed, only ascii).
Correction every file manually by renaming in the filelist is error prone and an unpopular work.
There exists already a function in the FAL-driver called sanitizeFilename() which corrects filenames or directynames after creation, renaming, etc.
It could be a solution to execute this function recursively on every file via a cron task or via a clean up task in the install tool.
TYPO3 CMS 7.6.15