Updated and added license information to reflect 2011

Added better runfile ownership and security. pid & cache file
are now stored in /var/run/smradius by default and the log file
is stored in /var/log/smradius by default . user= and group=
will apply to both of these now.

Added support for abuse prevention using the below configuration item
[radius]
use_abuse_prevention=yes

Moved use_packet_timestamp from [server] to [radius]

Added additional profiling informaion to logging messages

If ->log is given additional arguments, the $msg will be used as
a format, and all additional arguments will be used as parameters
to sprintf()

Pass datetime as text to DBSelect
Selected topups ValidFrom must equal the first of the current month

* Improved logging

Added default config get
Added client config get

* Fixed up configuration module and cleaned up code

* Few cosmetic changes

* 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

Added features support

* User_get now takes 3 parameters: self, user, packet

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