ZMLarch boot switches

Beginning with ZMLarch_svn_2917 (aka 1.24.2_pre1) there are some useful boot switches and liveCD enhancements. By hitting the "tab" key at the liveCD boot menu you can append to the boot cmdline.

Adding "sshd"(quotes not required) will cause the ssh server to be started at bootup. This may be desirable for remote access to install on a machine without a graphic display for example.

For this to be useful a root password must be set. Otherwise there is no way to login remotely. Adding "passwd=secret" to the cmdline string will set the root password to "secret"

A unique hostame is now set up for the liveCD system. It has the form "zmhost_nn(n)_nn(n)" The numeric portion is determined by the last two octets of the mac address of the network interface. The preference order of interfaces is "wlan0", "ath0","eth0". Having a unique hostname enables us to use avahi to announce zeroconf network services. So the liveCD system can be used in a headless, dhcp configured network setup. Useful for "on the fly" temporary deployment. Of course these features can also be used in a more permanently installed system as well.