Add dhcp client options in CLI:
set interfaces ethernet eth0 dhcp-options client-option "send host-name "my_hostname";"
Add dhcp client options in CLI:
set interfaces ethernet eth0 dhcp-options client-option "send host-name "my_hostname";"
@syncer send hostname is automatically set, so not sure if that task is still valid. (see: /var/lib/dhcp/dhclient_eth0.conf).
The value is taken from hostname.
However dhcp has a ton of client options (https://tools.ietf.org/html/rfc2132), implementing all of them or just a portion and make them configurable, means the rewrite of th dhclient scripts, which I think is overdue anyway.