[nsp] router configuration tracking and AAA server

[rpcbind@speakeasy.net]

> Some tools use syslog logoff messeges to trigger the
> config dowload and immediate diff with the old one.
> This  cannot cope with the case when two users are
> logged and make changes simultaneosly. 

CISCO-CONFIG-MAN-MIB is what you're looking for. Specifically, 
ciscoConfigManEvent.

http://www.cisco.com/cgi-bin/Support/Mibbrowser/unity.pl?o=1.3.6.1.4.1.9.9.43.2.0.1&t=yes&st=3

..and config history can be built nicely from ccmHistoryEventTable

http://www.cisco.com/cgi-bin/Support/Mibbrowser/unity.pl?o=1.3.6.1.4.1.9.9.43.1.1.6&t=yes&st=3

Enjoy.