[$] Filesystems and case-insensitivity

A recurring topic in filesystem-developer circles is on handlingcase-insensitive file names. Filesystems for other operating systems doso but, by and large, Linux filesystems do not. In the Kernel Summit trackof the 2018 Linux Plumbers Conference (LPC),Gabriel Krisman Bertazi described his plans for making Linux filesystemsencoding-aware as part of an effort to make ext4, and possibly otherfilesystems, interoperable with case-insensitivity in Android, Windows, and macOS.