Merge pull request #635 from netbootxyz/backbox7

add backbox 7

roles/netbootxyz/templates/menu/live-backbox.ipxe.j2

@@ -7,6 +7,7 @@ set os BackBox
 menu ${os} - Current Arch [ ${arch} ]
 iseq ${arch} x86_64 && set arch_a amd64 || set arch_a ${arch}
 item --gap ${os} Versions
+item 7 ${space} ${os} 7
 item 6 ${space} ${os} 6
 choose live_version || goto live_exit
 goto ${live_version}
@@ -31,6 +32,12 @@ kernel ${kernel_url}vmlinuz ip=dhcp boot=casper netboot=http fetch=${squash_url}
 initrd ${kernel_url}initrd
 boot
 
+:7-boot
+imgfree
+kernel ${kernel_url}vmlinuz ip=dhcp boot=casper netboot=url url=${squash_url} initrd=initrd
+initrd ${kernel_url}initrd
+boot
+
 :live_exit
 clear menu
 exit 0