Among some of the most important changes, we can mention support for gzip compression levels 4-9, optional support for status=noxfer/none, the ability to start DNS labels with a number, as well as cscope target fixes. BusyBox has been switched to the POSIX utmpx API (Application Programming Interface), the “-k /path/to/skel” option was added to the adduser command, and the path to configuration files will no longer be hardcoded for the iproute command.