Harden NordVPN reconciliation and WebGUI testing

tests/ui/stop-opnsense.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+set -eu
+
+script_dir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+pid_file="$script_dir/.runtime/launcher.pid"
+
+if [ ! -r "$pid_file" ]; then
+    rm -f "$script_dir/.runtime/launcher.log"
+    exit 0
+fi
+read -r pid < "$pid_file"
+case "$pid" in
+    '' | *[!0-9]*) exit 1 ;;
+esac
+command=$(ps -p "$pid" -o command= 2>/dev/null || true)
+case "$command" in
+    *"$script_dir/start-opnsense.sh"*)
+        kill "$pid"
+        rm -f "$script_dir/.runtime/launcher.log"
+        ;;
+    *) exit 1 ;;
+esac