I can confirm the bug still exist in the Jessie version on oct 27 2015...
I think someone could have a look here :
/usr/share/live/build/functions/defaults.sh
Line 809
netboot)
case "${LB_DEBIAN_INSTALLER_PRESEEDFILE}" in
*://*)
_LB_BOOTAPPEND_PRESEED="file=${LB_DEBIAN_INSTALLER_PRESEEDFILE}"
;;
*)
_LB_BOOTAPPEND_PRESEED="file=/${LB_DEBIAN_INSTALLER_PRESEEDFILE}"
;;
esac
LB_BOOTAPPEND_NETBOOT="netboot=$LB_NET_ROOT_FILESYSTEM
nfsroot=$LB_NET_ROOT_SERVER:$LB_NET_ROOT_PATH ip=dhcp rw"
LB_BOOTAPPEND_LIVE="$LB_BOOTAPPEND_LIVE
$LB_BOOTAPPEND_NETBOOT"
LB_BOOTAPPEND_LIVE_FAILSAFE="$LB_BOOTAPPEND_LIVE_FAILSAFE
$LB_BOOTAPPEND_NETBOOT"
Thus the options for netbooting are present in the tftpboot/live.cfg file...
--
*Jérôme Avond*
m/j : [email protected]