o completely TCHECK()-ified
o PPP disconnect cause info AVP support added (RFC3145)
o use u_int16_t/u_int32_t instead of u_short/u_int
o use tok2str() to better support discrete array
o fixed bug (Authen Name AVP is now decoded as a string)
o code clean up
Hope I did not break anything. Portability on IPv4-only node needs checking,
I'll do this very soon. (sorry for rather jumbo commit)
XXx what is _FAVOR_BSD?