Xen templates

Description here... ```bash # Docs http://wiki.debian.org/Xen?highlight=((DebianInstaller|Xen))#DomU.28guest.29 # 20 Gb disk image dd if=/dev/zero of=/srv/xen/mailserver.img oflag=direct bs=1M seek=20470 count=1 # Copy template cp template.cfg domu.cfg # Edit template xxx # Start domU xm create -c domu.cfg ```