+- Reset .die on master takeover (so that dying sessions don't have to
+ hang around until the new master has the same uptime as the old one).
+- Update .last_packet in cluster_handle_bytes only when there have
+ been bytes received from the modem (dead sessions were having the
+ idle timeout reset by stray packets).
+- Use cli_error() for error messages and help.
+- Add a Cisco-Avpair with intercept details to RADIUS Start/Stop
+ records.
+- Don't use LOG() macro in initdata() until the config struct has been
+ allocated (uses config->debug).
+- Initialise log_stream to stderr to catch errors before the config file
+ is read.