dhcp incorrect license
The license was changed when 4.4.0 was released.
DHCP is available for free download under the terms of the MPL 2.0
“BIND versions prior to BIND 9.11.0, all versions of ISC DHCP prior to ISC DHCP 4.4.0, and Kea versions prior to Kea 1.0.0 are released under the ISC License[…]”
(from redmine: issue id 10161, created on 2019-03-26, closed on 2019-06-19)