adjustments to the installer and updater to ensure

`lsof` is installed

scripts/update_birdnet_snippets.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+# Update BirdNET-Pi
+source /etc/birdnet/birdnet.conf
+trap 'exit 1' SIGINT SIGHUP
+USER=$(awk -F: '/1000/ {print $1}' /etc/passwd)
+HOME=$(awk -F: '/1000/ {print $6}' /etc/passwd)
+my_dir=$HOME/BirdNET-Pi/scripts
+if ! grep python3 <(head -n1 $my_dir/analyze.py);then
+  echo "Ensure all python scripts use the virtual environment"
+  sed -si "1 i\\#\!$HOME/BirdNET-Pi/birdnet/bin/python3" $my_dir/*.py
+fi
+if ! grep PRIVACY_MODE /etc/birdnet/birdnet.conf;then
+  sudo -u${USER} echo "PRIVACY_MODE=off" >> /etc/birdnet/birdnet.conf
+fi
+if ! which lsof &>/dev/null;then
+  sudo apt update && sudo apt -y install lsof
+fi