fix source path and improve systemd directivees

diyvpnctl.sh

@@ -7,7 +7,7 @@ diyvpn_cfg="${DIYVPN_CFG:-$HOME/.config/diyvpn/servers}"
 add() {
 	local name listen_address idle_timeout hostname port username identityfile
 
-	read -rp "Server name [e.g. foobar] [required] : " name
+	read -rp "Server name [e.g. vps1] [required] : " name
 	if [[ -d "$diyvpn_cfg/$name" ]]; then
 		echo "Warning: $diyvpn_cfg/$name already exists. Exising files will be overwritten. [Ctrl+C to quit]"
 	fi