Add copyright headers

advanced/Scripts/piholeLogFlush.sh

@@ -1,3 +1,11 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Flushes /var/log/pihole.log
+# (c) 2015 by Jacob Salmela
+# This file is part of Pi-hole.
+#
+#Pi-hole is free software: you can redistribute it and/or modify
+#it under the terms of the GNU General Public License as published by
+#the Free Software Foundation, either version 2 of the License, or
+#(at your option) any later version.
+
 truncate -s 0 /var/log/pihole.log