[$] Case-insensitive ext4

<p>Handling file names in a case-insensitive way for Linux filesystems hasbeen an ongoing discussion topic for many years. It is a (dubious) feature of filesystemsfor other operating systems (e.g. Android, Windows, macOS), but Linux haslimited support for it. Over the last year or more, Gabriel KrismanBertazi has been working on the problem forext4, but it is a messy one to solve. He recently posted his latest patchset, which reflects some changes made at the behest of Linus Torvalds.