-# Source `dirname $0`/srclistvars.sh first, if it exists.
-
-# Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+# Empty (or only whitespace) input lines are ignored.
+# Lines beginning with # are ignored.
+# Lines with just one word are ignored.
+# Otherwise, the line has two or more whitespace-separated words:
+# the first word is the source, the second word is the destination,
+# other optional words are options.
+# The possible options are "gpl" (to replace the license with the GPL)
+# and "doclicense" (to replace @include doclicense.texi with fdl.texi).
+# Unrecognized options are ignored.
+# $VARIABLE expansions are done (with sh eval).
+#
+# This script is used in gnulib and texinfo; the input files are named
+# srclist.txt.