Check for syncthing id files in user directories

src/freedombone-syncthing

 
     for d in /home/*/ ; do
         USERNAME=$(echo "$d" | awk -F '/' '{print $3}')
+        if [ ! -f /home/$USERNAME/.syncthing-server-id ]; then
+            CHANGED=1
+            return
+        fi
+    done
+
+    for d in /home/*/ ; do
+        USERNAME=$(echo "$d" | awk -F '/' '{print $3}')
         if [[ $(is_valid_user "$USERNAME") == "1" ]]; then
             if [ -f /home/$USERNAME/$SYNCTHING_UPDATE_FILE ]; then
                 CHANGED=1