FAI release 6.4 with new features

[Thomas Lange]

The new FAI release 6.4 comes with some nice new features.

It now supports installing the Xfce edition of Linux Mint
22.1 'Xia'. There's also a new ISO [1] which does the unattended Linux
Mint installation via FAI and does not need a network connection
because all packages are available on the ISO.

The package_config configurations now support arbitrary boolean
expressions with FAI classes like this:
  PACKAGES install UBUNTU && XORG && ! MINT

If you use the command ifclass in customization scripts you can now
also use these expressions.

The tool fai-kvm for starting a KVM virtual machine will use UEFI
variables if the VM is started with an UEFI environment, so boot
settings will be saved during a reboot.

For the installation of Rocky Linux and Almalinux in an UEFI
environment some configuration files were added.

New ISO images are available [2] but it may take a couple of weeks
until the FAIme service [3] supports Linux Mint and the new FAI version.


[1]: https://fai-project.org/fai-cd/faicd64-linuxmint-only_6.4.iso
[2]: https://fai-project.org/fai-cd/
[3]: https://fai-project.org/FAIme