Fixed spelling mistakes

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()

Added correct location of awit files
Cleaned up whitespaces

Copied from gnu.org site

Enable the use of the disabled parameter for admin user and group attributes in the webgui. Allow smradiusd to select enabled attributes.

List current topups and usages

Use built in DateTime methods
Added SMAdminDepletedOn functionality and columns

Remove 'value' element if it's not needed
Remove unnecessary next and setting excess usage to zero

We don't want to look for previous topups, this causes smadmin to to calculate usage when it doesn't need to

Results for admin interface are now in line with user interface

Indexed PeriodKey column

Cleaned up data and uptime calculation

Check if user is disabled

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

* If we have somehow gotten duplicate sessions and we roll over to midnight, we must not rollunder to -4G and record 4G minus the difference in usage as the new session usage. Lets record 0 instead.