Add licensing exception for Autoconf.

diff --git a/config.guess b/config.guess
index aa11738..c62d93b 100755 (executable)
--- a/config.guess
+++ b/config.guess
@@ -1,5 +1,5 @@
 #!/bin/sh
-# This script attempts to guess a canonical system name.
+# Attempt to guess a canonical system name.
 #   Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
 #
 # This file is free software; you can redistribute it and/or modify it
@@ -14,7 +14,12 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, write to the Free Software
-# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
 
 # Written by Per Bothner <bothner@cygnus.com>.
 # The master version of this file is at the FSF in /home/gd/gnu/lib.