Switch verify from gpg to openssl on archlinux

Fixes: https://github.com/netbootxyz/netboot.xyz/issues/1245

roles/netbootxyz/templates/menu/archlinux.ipxe.j2

@@ -36,7 +36,7 @@ iseq ${os_arch} i686 && goto boot32 ||
 :boot
 imgfree
 set dir ${archlinux_base_dir}/iso/${arch_version}/arch/boot
-set params archiso_http_srv=http://${real_archlinux_mirror}/${archlinux_base_dir}/iso/${arch_version}/ archisobasedir=arch verify=y ${ipparam} net.ifnames=0 {{ kernel_params }}
+set params archiso_http_srv=http://${real_archlinux_mirror}/${archlinux_base_dir}/iso/${arch_version}/ archisobasedir=arch cms_verify=y ${ipparam} net.ifnames=0 {{ kernel_params }}
 kernel http://${archlinux_mirror}/${dir}/${os_arch}/vmlinuz-linux ${params}
 initrd http://${archlinux_mirror}/${dir}/${os_arch}/initramfs-linux.img
 echo