ModemManager and d-bus permissions in OpenWrt

[Peter Naulls]

This is really an OpenWrt question, but I wanted to understand the specifics 
with MM.  We're undergoing a security review, and it's been pointed out that
d-bus runs as non-root. I've created a new "dbus" user and group like ubus
has and have d-bus run under it as per its config file.

Everything seems OK with MM, and indeed I think this is the only user of
it under my OpenWrt setup, hence the question here.

Is this likely to break anything?