Set D_TRACKCLOSE to avoid a race in devfs that could lead to orphaned bpf devices never getting fully closed.
Set D_TRACKCLOSE to avoid a race in devfs that could lead to orphaned bpf
devices never getting fully closed.

MFC after:	3 days

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