Add a headless option in arch-template
Add a headless option in arch-template

elasticdog/packer-arch,tomaspapan/packer-arch,cosmo0920/packer-arch,appleby/Lisp-In-Small-Pieces-VM,slash170/packer-arch,tomswartz07/packer-arch,agt-the-walker/packer-arch,aidanharris/packer-arch