Change critical section protection for dummynet from splnet() to splimp() -- we need it because dummynet can be invoked by the bridging code at splimp().
Change critical section protection for dummynet from splnet() to
splimp() -- we need it because dummynet can be invoked by the
bridging code at splimp().

This should cure the pipe "stalls" that several people have been
reporting on -stable while using bridging+dummynet (the problem
would not affect routers using dummynet).

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase