miniupnpd/testgetifaddr.sh: fix for FreeBSD
OS=`uname -s`
case $OS in
- OpenBSD | Darwin | SunOS)
+ FreeBSD | OpenBSD | Darwin | SunOS)
NS="`which netstat`" || exit 1
IFCONFIG="`which ifconfig`" || exit 1
EXTIF="`$NS -r -f inet | grep 'default' | awk '{ print $NF }' `" || exit 1
