ppp panic: 3rd try

[Yann Berthier]

   Hi list,

   As i have posted 2 times, there is a regression somewhere between the
   ppp and the tty code (or i suppose so)

   kernel from today, world in sync, backtrace attached:

   Nov  6 23:55:10 taz kernel: FreeBSD 6.0-CURRENT #4: Sat Nov  6
   21:56:36 CET 2004

   This prevents me to follow -CURRENT, ppp tunnels are a *must need*
   for me. I'd be happy to learn that this is a pilot error ...

   As already said, a core is available to whoever wants to tackle this
   problem :-P

   I'll fill a PR tomorrow

      - yann