update configuration

grub.default

@@ -1,3 +1,5 @@
+# GRUB boot loader configuration
+
 GRUB_DEFAULT=0
 GRUB_TIMEOUT=5
 GRUB_DISTRIBUTOR="Arch"
@@ -7,6 +9,9 @@ GRUB_CMDLINE_LINUX=""
 # Preload both GPT and MBR modules so that they are not missed
 GRUB_PRELOAD_MODULES="part_gpt part_msdos"
 
+# Uncomment to enable booting from LUKS encrypted devices
+#GRUB_ENABLE_CRYPTODISK=y
+
 # Uncomment to enable Hidden Menu, and optionally hide the timeout count
 #GRUB_HIDDEN_TIMEOUT=5
 #GRUB_HIDDEN_TIMEOUT_QUIET=true
@@ -44,4 +49,6 @@ GRUB_DISABLE_RECOVERY=true
 # Uncomment to get a beep at GRUB start
 #GRUB_INIT_TUNE="480 440 1"
 
+# Uncomment to make GRUB remember the last selection. This requires to
+# set 'GRUB_DEFAULT=saved' above.
 #GRUB_SAVEDEFAULT="true"