Add a missing module version declaration to if_tun(4).
Add a missing module version declaration to if_tun(4).

PR:		181078
Submitted by:	Brandon Gooch <jamesbrandongooch@gmail.com>
MFC after:	1 week

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