Log Message:
Changes 2.1.7:
* Full support for CoA and Disconnect packets as per RFC 3576 and RFC 5176.
  Both receiving and proxying packets is supported.
* Added "src_ipaddr" configuration to "home_server". See \ 
proxy.conf for details.
* radsniff now accepts -I, to read from a filename instead of a device.
* radsniff also prints matching requests and any responses to those requests
  when '-r' is used.
* Added example of attr_filter for Access-Challenge packets
* Added support for udpfromto in DHCP code
* radmin can now selectively mark modules alive/dead. See "set module \ 
state".
* Added customizable messages on login success/fail.
* Document "chase_referrals" and "rebind" in raddb/modules/ldap
* Preliminary implementation of DHCP relay.
* Made thread pool section optional. If it doesn't exist, the server will run
  single-threaded.
* More...