MobileConfig - Handle wired connectivity

[extrafu]

It is possible to generate mobileconfig for OS X/macOS that supports the wired network - which can be especially useful for EAP-PEAP and EAP-TLS. That's built in OS X/mac OS.

Our upcoming rewrite of the provisioning agent for Windows (done by @Zouelie ) will also handle wired interfaces for EAP-PEAP and EAP-TLS.

So PacketFence should be modified to generate the right connection based on the connection profile (wired vs. WiFi).

On OS X/macOS, it is also possible to have the wired and WiFi configuration in the same mobileconfig file - and the new provisioning agent for Windows will also support this. We should discuss this internally to perhaps generate the mobileconfig for both NICs under certain circumstances.