miniupnpc: prepare version 1.8 !
upnpsoap.c: fix 2 memory leaks in GetListOfPortMappings()
miniupnpd: Implement get_src_for_route_to() for *BSD

Also modify get_src_for_route_to() to return
the network interface index
miniupnpd: filter HTTP and SSDP based on source IP

Check source address of incomining HTTP connections and SSDP
packets in order to filter out WAN SSDP and HTTP trafic.
miniupnpd: prepare for version 1.8