merge back 2.0 branch changes

Changes

@@ -1,4 +1,4 @@
-* Wed Feb 9 2005 Brendan O'Dea <bod@optusnet.com.au> 2.1.0
+* Mon Feb 14 2005 Brendan O'Dea <bod@optusnet.com.au> 2.1.0
 - Add IPv6 support from Jonathan McDowell.
 - Add CHAP support from Jordan Hrycaj (work in progress).
 - Sanity check that cluster_send_session is not called from a child
@@ -17,8 +17,21 @@
 - Show time since last counter reset in "show counters".
 - Remove "save_state" option.  Not maintained anymore; use clustering
   to retain state across restarts.
-- Fix off-by-one in session/tunnel table initialisation.
+- Ensure that sessionkill is not called on an unopened session (borks
+  the freelist).
 - Bump MAXSESSION to 60K.
+- Fix off-by-one errors in session/tunnel initialisation and
+  sessiont <-> sessionidt functions.
+- Use session[s].opened consistently when checking for in-use sessions
+  (rather than session[s].tunnel).
+- Use <= cluster_highest_sessionid rather than < MAXSESSION in a
+  couple of loops.
+- Don't kill a whole tunnel if we're out of sessions.
+- Change session[s].ip to 0 if set from RADIUS to 255.255.255.254;
+  avoids the possibility that it will be interpreted as a valid IP
+  address.
+- Avoid a possible buffer overflow in processpap.
+- Kill session if authentication was rejected.
 
 * Fri Dec 17 2004 Brendan O'Dea <bod@optusnet.com.au> 2.0.13
 - Better cluster master collision resolution: keep a counter of state