[Bro] credit-card-exposure script

[vincent at ragosta.net]

Seth,

I appreciate you looking at this so quickly, but I still cannot get a 
notice to be raised with the latest changes. No error is reported and 
the script is loaded. Is there anything else I can check to debug this?

Thank you,

Vincent


> Thanks for the traffic, there were some lingering bugs.  I also added
> an option to make it work for the traffic you sent me.
> 
> redef CreditCardExposure::use_cc_separators=F;
> 
> That will make the script validate long strings of digits (it only
> worked if the CC# had internal separators before).
> 
> Thanks!
>   .Seth