use GFDL 1.3 properly

[Eric Blake]

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Santiago Vila pointed out that m4's conversion to GFDL 1.3 was incomplete;
and I made the mistake of copying-and-pasting m4's action over to
autoconf: http://git.sv.gnu.org/cgit/autoconf.git/commit/?id=a30e6f.

Pushing this.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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>From 15163ab08a7fa5bf47eaec1a7793f97a0e261613 Mon Sep 17 00:00:00 2001
From: Eric Blake <address@hidden>
Date: Mon, 13 Apr 2009 05:55:35 -0600
Subject: [PATCH] Finish upgrade to GFDL 1.3.

* doc/autoconf.texi (copying): Use correct license; comment change
was missed on 2008-11-04.

Signed-off-by: Eric Blake <address@hidden>
---
 ChangeLog         |    6 ++++++
 doc/autoconf.texi |    2 +-
 2 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 0e18a41..efa2056 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2009-04-13  Eric Blake  <address@hidden>
+
+       Finish upgrade to GFDL 1.3.
+       * doc/autoconf.texi (copying): Use correct license; comment change
+       was missed on 2008-11-04.
+
 2009-04-10  Eric Blake  <address@hidden>

        Test parallel handling of syntax error.
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 32855a9..8dd22d6 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -189,7 +189,7 @@
 @quotation
 Permission is granted to copy, distribute and/or modify this document
 under the terms of the @acronym{GNU} Free Documentation License,
-Version 1.2 or any later version published by the Free Software
+Version 1.3 or any later version published by the Free Software
 Foundation; with no Invariant Sections, with the Front-Cover texts
 being ``A @acronym{GNU} Manual,'' and with the Back-Cover Texts as in
 (a) below.  A copy of the license is included in the section entitled
-- 
1.6.1.2