Certain Vendors use special DHCP options (so called vendor specific options).
We should add a CLI variant to pass the IP address of the Ubiquity Unify Controller to clients.
Usecase (actually ma home):
VyOS router with several UniFi APs. Initial provisioning requires a controller to be present. One can either adopt them via SSH or by a DHCP option.
See: https://community.ui.com/questions/DHCP-Options/ca4c4113-b93c-4507-acd2-68bac31c6258#answer/0f451832-b211-4652-a8ad-d124a22beae9