Ommit OpenVPN if not installed.

change_network_gateway.sh

@@ -121,14 +121,16 @@ fi
 # - OpenVPN:
 # -    /etc/openvpn/*
 # -
-echo -en "\tVPN settings.."
-/etc/init.d/openvpn stop > /dev/null
-rm -rf /etc/openvpn
-cp -a ${base_dir}/${network}/openvpn /etc/openvpn
-if [ "$?" != "0" ]; then
-   echo_FAILED
-else
-   echo_OK
+if [[ -d "/etc/openvpn" ]]; then
+   echo -en "\tVPN settings.."
+   /etc/init.d/openvpn stop > /dev/null
+   rm -rf /etc/openvpn
+   cp -a ${base_dir}/${network}/openvpn /etc/openvpn
+   if [ "$?" != "0" ]; then
+      echo_FAILED
+   else
+      echo_OK
+   fi
 fi
 
 if [ -d "/root/.openvpn" ]; then