Multi-homed host: ipaddress flag doesn't prevent wrong multicasts

[kapfenho]

I am running AssetUPnP 4.6.3 on a multihomed environment on Debian x86_64. To
run the UPnP service in one network only I use flag

--ipaddress x.x.x.x

TCP and UDP listener bind to the correct socket, other networks are not used.

However, the...