Restart nginx if needed after vpn removal

src/freedombone-app-vpn

     systemctl stop openvpn
     if [ $VPN_TLS_PORT -ne 443 ]; then
         firewall_remove VPN-TLS $VPN_TLS_PORT
+    else
+        systemctl enable nginx
+        systemctl restart nginx
     fi
 
     apt-get -yq remove --purge fastd openvpn easy-rsa