Update comment regarding MAC labels: we no longer pass endpoints into the MAC Framework, just the pipe pair.
Update comment regarding MAC labels: we no longer pass endpoints
into the MAC Framework, just the pipe pair.

GC 'hadpeer' used in pipedestroy(), which is no longer needed as
we check pipe_present flags on the pair.

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