Use stricter checking to match possible vlan clones by not allowing extra garbage characters around or within the tag.
Use stricter checking to match possible vlan clones by not allowing extra
garbage characters around or within the tag.

Reviewed by:	brooks
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