Bug#1106607: freerdp3: Please add -DCHANNEL_RDP2TCP=ON -DCHANNEL_RDP2TCP_CLIENT=ON (was in freerdp2, missing in freerdp3)

[Arnaud Rebillout <arnaudr@kali.org>]

One last update:

> After enabling it in the build options, it turns out the feature is
not functional anyway

That was wrong! As reported at [1], it turns out that the error message
is harmless, and the rdp2tcp feature is functional.

So my initial request stands: please built freerdp3 with rdp2tcp
support, maybe by setting these build options in d/rules:

```
-DCHANNEL_RDP2TCP=ON -DCHANNEL_RDP2TCP_CLIENT=ON
```

Thank you!

[1]: https://bugs.kali.org/view.php?id=9197#c20645

-- 
Arnaud Rebillout / OffSec / Kali Linux Developer