Fixed handling of topups when there is no overusage
Support for a prepaid system

Use summary topup with left over bandwidth from previous month and topups valid for current month to add to cap
Fetches only topups within valid dates now

Added date validation feature for checking if the account is allowed to connect or not on the current date

* Use internal timestamp instead of the one in the packet which is not always present

* Fixed up configuration module and cleaned up code

* Changed attribute name SMRadius-Capping-Time-Limit to SMRadius-Capping-UpTime-Limit, this makes way for another feature to be added soon

* Changed user. macros to userdb. in hard coded defaults

* Make userdb macros entirely dynamic

* Use  request.  and not  authentication. as macros

* Fixed Magic1 and Magic2 arrays
* Few cosmetic changes

* Ensure that authentication modules use the attribute details, remove hardcoding

* Added function to get attribute values in attributes.pm
* Fixed some of the function names for attribute operations

Added initial support for realms and realm attributes