Improved local address support on linux
Improved local address support on linux

Do not rely on hardcoded interface names (eth0, wlan0) in sqResolverLocalAddress(void). Use ifa_flags to filter the list instead.
When an interface has no address assigned, just skip it instead of failing the primitive and leaking memory (return without calling freeifaddrs).

OpenSmalltalk/vm,OpenSmalltalk/vm,OpenSmalltalk/vm,timfel/squeakvm,timfel/squeakvm,timfel/squeakvm,timfel/squeakvm,OpenSmalltalk/vm,OpenSmalltalk/vm,OpenSmalltalk/vm,timfel/squeakvm,timfel/squeakvm,OpenSmalltalk/vm,timfel/squeakvm,OpenSmalltalk/vm,timfel/squeakvm