[update] : Updated comments

Author: Hayao0819

default.conf

@@ -130,9 +130,8 @@ norescue_entry=false
 # Modules to include
 # An array of module directory names to include.
 # This setting cannot be changed by an argument.
-modules=(
-    "share"
-)
+# Use this array only in the configuration files in the channel.
+#modules=("share")
 
 #-- kernel config --#
 # Set the kernel that live session use.
@@ -287,7 +286,8 @@ additional_exclude_pkg=()
 
 # Additional list of modules to load
 # Use this array for debugging only
-# This setting cannot be changed by an argument.
+# Change the default behavior of "--add-module".
+# This array is not available in the configuration files in the channel.
 additional_modules=()
 
 # Run with tee command