Revert "Remove track6 dhcp configuration since dhcp6 will do this for us."
Revert "Remove track6 dhcp configuration since dhcp6 will do this for us."

This reverts commit 6ebfa0ccfd7db500a4f85d2d45ebd74699a8805f.

pfsense/pfsense,phil-davis/pfsense,phil-davis/pfsense,BlackstarGroup/pfsense,phil-davis/pfsense,NewEraCracker/pfsense,dennypage/pfsense,pfsense/pfsense,brunostein/pfsense,brunostein/pfsense,NewEraCracker/pfsense,NewEraCracker/pfsense,pfsense/pfsense,jxmx/pfsense,pfsense/pfsense,jxmx/pfsense,ptorsten/pfsense,NOYB/pfsense,ch1c4um/pfsense,NewEraCracker/pfsense,ch1c4um/pfsense,BlackstarGroup/pfsense,ch1c4um/pfsense,NOYB/pfsense,BlackstarGroup/pfsense,ptorsten/pfsense,jxmx/pfsense,ptorsten/pfsense,brunostein/pfsense,ch1c4um/pfsense,dennypage/pfsense,dennypage/pfsense,BlackstarGroup/pfsense,dennypage/pfsense,NOYB/pfsense,phil-davis/pfsense