[archiso] Set net iface down if copytoram=y (default)

This should fix FS#36749

Also flush address on specified device (default)

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@gmail.com>

archiso/initcpio/hooks/archiso_pxe_common

@@ -50,7 +50,8 @@ run_latehook () {
     [[ -z "${copy_resolvconf}" ]] && copy_resolvconf="y"
 
     if [[ "${copytoram}" == "y" ]]; then
-        ip address flush scope global
+        ip addr flush ${bootif_dev}
+        ip link set ${bootif_dev} down
     elif [[ "${copy_resolvconf}" != "n" && -f /etc/resolv.conf ]]; then
         cp /etc/resolv.conf /new_root/etc/resolv.conf
     fi