mxgrub: add kernel option audit=0

to disable audit dmesg messages:
[240814.657807] audit: type=1006 audit(1522322245.903:219):
pid=32116 uid=0 old-auid=4294967295 auid=5252 tty=(none)
old-ses=4294967295 ses=218 res=1

audit wurde aktiviert durch das hinzukommen von journald
beim update vom systemd

notes:
https://github.com/systemd/systemd/issues/959
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=773528

mxgrub/mxgrub

@@ -233,7 +233,7 @@ sub update_grub_cfg {
 
 	for my $label (@MARIUX) {
 		my $image=label_to_image($label);
-		$kernellist.="\tmenuentry \"$label\" --unrestricted { save_env chosen ; linux /boot/$image crashkernel=256M root=LABEL=root ro console=ttyS1,115200n8 console=tty0 init=/bin/systemd ; initrd /boot/grub/initramfs.igz }\n";
+		$kernellist.="\tmenuentry \"$label\" --unrestricted { save_env chosen ; linux /boot/$image crashkernel=256M root=LABEL=root ro console=ttyS1,115200n8 console=tty0 init=/bin/systemd audit=0 ; initrd /boot/grub/initramfs.igz }\n";
 	}
 
 	my $GRUB_CFG_NEW=<<"EOF";
@@ -247,10 +247,10 @@ set default="$MARIUX_DEFAULT"
 load_env
 if [ -e /etc/local/USB.usb ]; then
 	set default="mariuxUSB"
-	menuentry "mariuxUSB" --unrestricted { save_env chosen ; linux /boot/bzImage.x86_64 crashkernel=256M root=LABEL=rootusb ro init=/bin/systemd ; initrd /boot/grub/initramfs.igz }
+	menuentry "mariuxUSB" --unrestricted { save_env chosen ; linux /boot/bzImage.x86_64 crashkernel=256M root=LABEL=rootusb ro init=/bin/systemd audit=0 ; initrd /boot/grub/initramfs.igz }
 else
 
-menuentry "$MARIUX_DEFAULT" --unrestricted { set chosen="$submenu>$MARIUX_DEFAULT" ; save_env chosen ; linux /boot/bzImage.x86_64 crashkernel=256M root=LABEL=root ro console=ttyS1,115200n8 console=tty0 init=/bin/systemd ; initrd /boot/grub/initramfs.igz }
+menuentry "$MARIUX_DEFAULT" --unrestricted { set chosen="$submenu>$MARIUX_DEFAULT" ; save_env chosen ; linux /boot/bzImage.x86_64 crashkernel=256M root=LABEL=root ro console=ttyS1,115200n8 console=tty0 init=/bin/systemd audit=0 ; initrd /boot/grub/initramfs.igz }
 
 submenu "$submenu" --unrestricted {
 $kernellist