[Conf] Example file.

[ndruba]

Hi!
First of all, thank you. This utility help me build jailed dhcp server without monstrous vnet topology, to which I experimentally came, in trying to use isc-dhcrelay.
But one place in example file confused me for a hour. I understand, that dhcpserver1 and dhcpserver2 not a var name only after reading sources.
In a row of another vars in conf file, to be more obviously if instead of

dhcpserver1 vlan1 vlan2 vlan3
dhcpserver2:1067 vlan1 vlan5

write the next:

3.3.3.3 vlan1 vlan2 vlan3
4.4.4.4:1067 vlan1 vlan5

Мaybe it's just my reading problem. I don't see the need of pull request for this change, but I can if you think so.

[sem-hub]

Ok. I think it's looks better.
I could change it when (if) I commit some changes next time.
But I lost access to test infrastructure, so I don't know how to test dhcprelya coherently now.