Init script: don't panic if DHCP server didn't give a host name

[Anthony Takata]

I adjusted 05network to allow boot to continue if no server name is given by DHCP server:

if [ -z $hostname ] || [ "x{$hostname}" = "x " ]; then

  log_begin_msg "ERROR: DHCP server didn't give me a hostname !!! Edit /etc/hosts in dhcp server for something not random."

  hostname="tcos_"

  hostname="${hostname}`hexdump -n 2 -e '/2 "%u"' /dev/urandom`"

fi

It is possible to adapt more of TCOS to give back this auto-generated host name to TCOSmonitor.

This will auto-generate a host name of tcos_$random, so that the generation of the Xorg cookie won't fail and break everything.