Adjust the VLAN section of the ifconfig(8) man page to better reflect reality:
Adjust the VLAN section of the ifconfig(8) man page to better reflect
reality:

1. Only 12-bit VLAN Identifiers, not full 16-bit VLAN tags can be set using
   ifconfig vlan.

2. When we mean VLAN Identifiers, spell it that way, rather than as VLAN tag.

MFC after:	3 days
Sponsored by:	Adara Networks, Inc.

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