uplink-notunnel: set hostname for dhcp-setup of interface

By default OpenWrt uses the hostname to request a DHCP-address. As the
hostname is already registered in the upstream-dhcpserver for the WAN-
interface, registering it again for the address of the ffuplink-interface
will fail. This causes constant logmessages when using OpenWrt on upstream
router.

> daemon.warn dnsmasq-dhcp: not giving name xxx to the DHCP lease of 192.168.x.x
> because the name exists in /tmp/hosts/dhcp.cfg01411c with address 192.168.x.y

uplinks/freifunk-berlin-uplink-notunnel/uci-defaults/freifunk-berlin-z95_notunnel

@@ -47,4 +47,5 @@ list_contains ifnames ffuplink_wan || uci set network.wan.ifname="${ifnames} ffu
 uci commit network.wan
 
 uci set network.ffuplink.proto=dhcp
+uci set network.ffuplink.hostname=freifunk-$(echo $macaddr|tr -d :)-uplink
 uci commit network.ffuplink