Support for setting hostname for Ethernet

[as-iotex]

Hi @JAndrassy

Thanks for the lib. I am currently trying to set the hostname for Ethernet using:

NetworkManager::setHostname(this->networkDetails.hostname);
Ethernet.begin(
                this->networkDetails.mac, 
                IPAddress(this->networkDetails.ip),
                IPAddress(this->networkDetails.dns),
                IPAddress(this->networkDetails.gateway),
                IPAddress(this->networkDetails.netmask)
            );

But it doesn't seem to work. The hostname is empty

Is this supported?

[JAndrassy]

hostname is used with DHCP, not with static IP.