
o Restore DBM capability for the users file
o Create generic read_conf_file function that reads radius-style
  config files once and stores them in momory. Not only would it
  be faster, it would make the "users.c" file much smaller, robust
  and sensible. [reread config on SIGHUP, ofcourse].
o Write better documentation
o ANSIfy the source
o take out host-order IP addresses
o Manual pages for the daemon, utilities and conffiles
o Max-Simultaneous-Use parameter to avoid double logins.
o IP address pool. Try to give user his last used IP address.
