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

Note: database schema for accounting_summary has been changed

Added UPGRADING file for upgrading information from previous revision