Yes, this was already discussed and I even remember that you suggest a way of assigning the variable depending on the IP type with a code snipped.

Regarding the simultaneous support of IPv4 and IPv6, Rafa and me were discussing on skype this morning about by the moment using just one `-localIp` command line option for both thing (supporting several interfaces, either IPv4 or IPv6, will be by the moment not supported, considering it a future improvement).