1.1.0-rc1: ffuplink is always enabled, even when not sharing internet

[pmelange]

The interface ffuplink is always enabled, even when the user decides not to share the internet connection. This can cause problems such as:

 just did a test. I installed the tunneldigger version. In the wizard, I selected mesh only (sharenet=0). I also connect the wan port to the internet. After reboot, the tunneldigger interface builds. That means that disabled=0 for the ffuplink interface.

I set up a second node with the no-tunnel version. In the wizard, I again selected mesh only. I also connected the wan port to ethernet. After reboot, the dhcp interface builds.

Both nodes see each other as smart gateways. There is no internet.

and here freifunk-berlin/firmware#603