chilli_radconfig use

Hey,

Can chilli_radconfig support a secondary radius server parameter for fallback.
Such as, running chilli_radconfig with "--radiusserver1=192.168.1.1 --radiusserver2=192.168.1.2"
so that if radiusserver1 isn't up, it'll query radiusserver2 to get the config from.

Also, on OpenWRT Kamikaze with coova-chilli 1.0.14 installed, running 'chilli_radconfig' without
any parameters it segfaults.

Regards,
Liran.