Add "pihole logging off noflush" command

Signed-off-by: DL6ER <dl6er@dl6er.de>

pihole

@@ -444,13 +444,17 @@ Specify whether the Pi-hole log should be used
 
 Options:
   on                  Enable the Pi-hole log at /var/log/pihole.log
-  off                 Disable the Pi-hole log at /var/log/pihole.log"
+  off                 Disable and flush the Pi-hole log at /var/log/pihole.log
+  off noflush         Disable the Pi-hole log at /var/log/pihole.log"
     exit 0
   elif [[ "${1}" == "off" ]]; then
     # Disable logging
     sed -i 's/^log-queries/#log-queries/' /etc/dnsmasq.d/01-pihole.conf
     sed -i 's/^QUERY_LOGGING=true/QUERY_LOGGING=false/' /etc/pihole/setupVars.conf
-    pihole -f
+    if [[ "${2}" != "noflush" ]]; then
+      # Flush logs
+      pihole -f
+    fi
     echo -e "  ${INFO} Disabling logging..."
     local str="Logging has been disabled!"
   elif [[ "${1}" == "on" ]]; then