Add HmollerCl paster for Adanced Networking

source/G/AdvancedNetworking.rst

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 Appendix G Advanced Networking
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+nm-tray has the benefit of being Qt instead of GTK (use already loaded libraries, consuming less resources) and lighter than conman. But, it is a little short for more complicated networking like VPN.
+
+VPN:
+To configure a VPN the best way to do it is with "Advanced Network Confiruation" in the Menu under Preferences. That will open network-manager-gnome you will need also to install the correaponding packages. In case of pptp those will be network-manager-pptp and network-manager-pptp-gnome. The you can follow the confiruation instruction for each VPN type.
+After the creation, it will appear as a new connection in nm-tray. One thing to consider is that nm-tray does not support password asking, so either you save the password FOR ALL USERS or you will need to connect diffently. 
+One of the  option is throug terminal with typing "nmcli con up id <VPN_name> --ask" changing <VPN_name> with the actual VPN connection name.
+The other option is to use nm-applet, the "simil" to nm-tray from network-manager.gnome. You can run it from the terminal typing "nm-applet", and you will end up with 2 connection indicators in the tray. The you can connect to the vpn with nm-applet and after the connection is established, you can close nm-applet and the connection will still be present.
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+Changing nm-tray for nm-applet
+If you don't want to run by terminal nm-applet you could change nm-tray for nm-applet. You will need to change the autostart. The easiest form to do this from the GUI is in the Menu going to Preferences -> LXQt configuration -> Session Configuration. There go to "Automatic Startup". You will see a list with checked and unchecked box, to autostart nm-applet, check "Network" to disable autostart for nm-tary uncheck nm-tray.