Fix removed interface still seen by netsh interface show interface

windows/scripts/ip

@@ -335,7 +335,7 @@ function install_tap_driver()
 
     # check if ifname has been installed
     if [[ ! "$1" == "" ]] ; then
-        netsh interface show interface | grep -q "\\b$1\\b"
+        netsh interface ipv6 show interface | grep -q "\\b$1\\b"
         if (( $? == 0 )) ; then
             echo "Nothing need to do, \"$1\" has been installed."
             return 0

windows/scripts/pre-uninstall.sh

@@ -15,7 +15,7 @@
 #
 # Remove virtual netcard installed by re6stnet 
 #
-for ifname in $(netsh interface show interface | gawk '{ print $3 }') ; do
+for ifname in $(netsh interface ipv6 show interface | gawk '{ print $5 }') ; do
     if [[ ("$ifname" == re6stnet*) && ("$ifname" != "re6stnet-lo") ]] ; then
         echo Removing network connection: $ifname
         ip vpntap del dev $ifname mode true