NetworkManager no longer provides complete FQDN (DHCP_HOSTNAME) to dhclient.
Previously, NetworkManager always sent only the host part of a machine host name in a DHCP request. As a consequence, it was not possible to force sending a Fully Qualified Domain Name (FQDN). After this update, the user can configure the FQDN to be sent in a DHCP request by using nmcli and setting ipv4.dhcp-fqdn to the desired FQDN and ensuring that ipv4.dhcp-send-hostname is enabled. In configuration files, the FQDN can be specified with the DHCP_FQDN variable.