Added wget, openssh-clients, patch and rsync to list of mandatory packages
Added hdparm cryptsetup-luks acpid nc kpartx to list of mandatory packages on a virtualisation host
Made disable_selinux() cope with SElinux not being installed or active
Call disable_selinux() from install_libvirt_host()
Moved package installation to earlier stage to ensure e.g. push_skeleton() works when called
Added owner parameter to upload_string()
Made root explicit owner of /etc/postfix/main.cf