The value of vRtrIfDHCPMatchOption82 specifies whether the
DHCP relay should use the circuit ID in the option 82 field
in DHCP packets to match DHCP messages. When it is set to 'true(1)',
the option 82 circuit ID is used in addition to the MAC address and
transaction ID. When it is set to 'false', only the MAC address and
transaction ID are used.