Change how user and group are stored in the logrotate config file (necessary on Ubuntu 16.04.1)

advanced/logrotate

@@ -1,4 +1,5 @@
 /var/log/pihole.log {
+	# su #
 	daily
 	copytruncate
 	rotate 5

automated install/basic-install.sh

@@ -949,7 +949,7 @@ installLogrotate() {
   # the local properties of the /var/log directory
   logusergroup="$(stat -c '%U %G' /var/log)"
   if [[ ! -z $logusergroup ]]; then
-    echo "su ${logusergroup}" >> /etc/pihole/logrotate
+    sed -i "s/# su #/su ${logusergroup}/" /etc/pihole/logrotate
   fi
   echo " done!"
 }