Output a line containing "Packages using this file".

lib/config.charset

@@ -82,6 +82,8 @@ os=`echo "$host" | sed -e 's/^[^-]*-[^-]*-\(.*\)$/\1/'`
 echo "# This file contains a table of character encoding aliases,"
 echo "# suitable for operating system '${os}'."
 echo "# It was automatically generated from config.charset."
+# List of references, updated during installation:
+echo "# Packages using this file: "
 case "$os" in
     linux* | *-gnu*)
 	# With glibc we don't need any canonicalization, because glibc