Configuration check

[Alan DeKok]

James Devine wrote:
> * globally writable I mean

  It already checks that.

$ chmod a+w raddb/proxy.con
$ radiusd -XC
...
Configuration file ./raddb//proxy.conf is globally writable.  Refusing
to start due to insecure configuration.
Errors reading or parsing ./raddb//debug.conf

  If you don't see this, it's because you're running a very old version
without that check, or raddb/proxy.conf isn't actually globally writable.

  Alan DeKok.