vpn: allow specifying endpoint

vpn.sh

@@ -9,7 +9,11 @@ case "$1" in
         pass git checkout nico-privat
         pass tws/nschottelius1 > /dev/null
 
-        authgroup=Europe
+        if [ "$2" ]; then
+            authgroup="$2"
+        else
+            authgroup=Europe
+        fi
 
         # Try to input the password directly, revert to non input if it fails
         pass tws/nschottelius1 | sudo openconnect --protocol=gp portal.techcorpapps.com \