* Log executed grml-live command line.
* Set FAI_DEBOOTSTRAP_OPTS="--exclude=dhcp-client,info"
by default.
+ * Use "newest" kernel only if two kernels are present in the chroot.
* Set $SECONDS to unknown if $start_seconds is not set.
* Log closing signs (----...) via bailout to make sure they are
always set - even when exiting with an error.