The client type rule allows DHCP, implicitly.  Since DHCPv6 uses link-local address unlike with DHCP, we need one more rule to allow the DHCPv6.
The client type rule allows DHCP, implicitly.  Since DHCPv6 uses
link-local address unlike with DHCP, we need one more rule to allow
the DHCPv6.

Reported by:	David Horn <dhorn2000__at__gmail.com>

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