RFC: Supporting proprietary UUIDs for MBIM devices

[Aleksander Morgado]

Hey!

> 
> Just wanted to let you know I've started working on porting the qmi-proxy
> over for mbim.
> 
> Also I was wondering if qmid is launched by the system or by ModemManager?
> 

qmi-proxy is launched automatically by the first application requesting
it through the specific flag when calling qmi_device_open(). It uses an
abstract linux socket, so it is assured that only one process gets to
open it, and there's also the uid check so that only root is allowed to
launch it (which we should maybe improve, i.e. remove the uid check, if
there is a better way to check that).

-- 
Aleksander