Moving CoreOS to main Linux menu

Now requires cloud-config-url, will probably add a resuce mode using autologin next

src/coreos.ipxe

@@ -0,0 +1,32 @@
+#!ipxe
+
+# CoreOS
+# https://www.coreos.com
+
+goto ${menu}
+
+:coreos
+set os coreos
+menu ${os}
+item --gap CoreOS:
+item stable ${space} CoreOS Stable Channel
+item beta ${space} CoreOS Beta Channel
+item alpha ${space} CoreOS Alpha Channel
+choose --default ${menu} menu || goto coreos_exit
+echo ${cls}
+goto boot_coreos ||
+goto coreos_exit
+
+:boot_coreos
+set release ${menu}
+set base-url http://${release}.release.core-os.net/amd64-usr/current
+isset cloud-config-url && echo Cloud Config URL is set... || echo -n Please set Cloud Config URL: && read cloud-config-url
+kernel ${base-url}/coreos_production_pxe.vmlinuz cloud-config-url=${cloud-config-url}
+initrd ${base-url}/coreos_production_pxe_image.cpio.gz
+boot
+goto coreos_exit
+
+:coreos_exit
+clear menu
+chain menu.ipxe
+exit 0

src/linux.ipxe

@@ -8,6 +8,7 @@ iseq ${arch} x86_64 && set arch_a amd64 || set arch_a ${arch}
 item --gap Operating Systems:
 item archlinux ${space} ArchLinux
 item centos ${space} CentOS 
+item coreos ${space} CoreOS
 item debian ${space} Debian
 item fedora ${space} Fedora
 item gentoo ${space} Gentoo
@@ -42,6 +43,10 @@ goto linux_menu
 chain centos.ipxe
 goto linux_menu
 
+:coreos
+chain coreos.ipxe
+goto linux_menu
+
 :debian
 chain debian.ipxe
 goto linux_menu