Add option to disable notification on shutdown warning

tools/arkmanager

@@ -1614,6 +1614,9 @@ doWarn(){
     local pid=`getServerPID`
     local sleeppid
     local usenotify=1
+    if [ -n "$noNotifyWarn" ]; then
+      usenotify=
+    fi
     if [ -n "$pid" ]; then
       local warnmsg
       local warnminutes=$(( arkwarnminutes ))

tools/arkmanager.cfg

@@ -43,6 +43,7 @@ msgWarnCancelled="Restart cancelled by player request"
 # notifyMsgStoppedListening="Server has stopped listening - restarting"
 # notifyMsgServerTerminated="Server exited - restarting"
 # notifyTemplate="Message from instance {instance} on server {server}: {msg}"
+# noNotifyWarning=true
 
 # Restart cancel chat command
 #chatCommandRestartCancel="/cancelupdate"