Wipes out existing configuration in diagnostics

[plawer]

The install script does not append but overwrites the commands to the following variables:
rc_custom
rc_firewall
rc_startup
rc_usb
rc_shutdown

This completely destroyed my existing configuration. It should append the changes to the existing variables, not overwrite them.

[vortex-5]

The difficulty with append is that when you execute stop.sh it needs to find exactly which lines it has added and remove them which is difficult to do.