URGENT:
o Max-Simultaneous-Use parameter to avoid double logins.
  This is done, but needs to be more careful (see comment in
  acct.c:rad_check_multi()  )
o Specify a program to be run on succesful login

NOT URGENT:
o Limit logins based on time/date 
  (for example, Login-Hour = 8-18, Login-Day = 0-5 for business hours)
o take out host-order IP addresses
o Write better documentation
o Manual pages for the daemon, utilities and conffiles (some done)
o IP address pool. Try to give user his last used IP address. This is
  hard, think of the ARP and or OSPF consequences in case the user comes
  in on a different term server - bad idea?
o Prefix/Suffix support
o Fix all FIXME's in the source.

DONE:
o Change radutmp format to v2 (see radutmp.h)
o move radutmp to /var/log ?
o Compatibility with radius-2.0 (almost)
o Support for pidfile
o Configurable logging: both radutmp/radwtmp and details files
o session_id is not numeric but an 8-byte (?) string !
o Detect reboot packet sent by portmaster and clear radutmp / wtmp
