dhclient doesn't send hostname to dhcp server

For example ISC dhcpd supports updating a name server if it is provided with a
hostname which the client can set. For example set up
breezybadgermachine.example.org if dhcpd is set up to update example.org. It
depends on the server if the hostname will be set or not, so I think maybe it
would be a nice idea to let Ubuntu clients send their hostnames while getting a
lease from dhcpd. If you want to do that now, you have to set it in
/etc/dhclient.conf yourself.

This is how a dhcpd lease for a Windows Client looks like on the server:
lease 192.168.1.119 {
        starts 3 2005/08/03 11:30:56;
        ends 3 2005/08/03 23:30:56;
        hardware ethernet 00:11:43:39:fb:34;
        uid 01:00:11:43:39:fb:34;
        client-hostname "aj";
}

This is how a dhcpd lease for a ordinary Ubuntu client looks like on a server:

lease 192.168.1.111 {
        starts 3 2005/08/03 13:12:45;
        ends 4 2005/08/04 01:12:45;
        hardware ethernet 00:00:e2:5b:b9:fd;
}

This is how a dhcpd lease looks like for a Ubuntu client on which I have edited
the dhclient.conf file to contain "send host.name and dhcp-client-identifier.

(
In dhclient.conf:
#send host-name "andare.fugue.com";
#send dhcp-client-identifier 1:0:a0:24:ab:fb:9c;
(man dhclient)
):

lease 192.168.1.111 {
        starts 3 2005/08/03 13:55:30;
        ends 4 2005/08/04 01:55:30;
        hardware ethernet 00:00:e2:5b:b9:fd;
        uid 01:00:00:e2:5b:b9:fd;
        client-hostname "mike";
}