use permissive copyright on all *.m4 files

[Jim Meyering]

I noticed that three .m4 files have LGPL copyright notices,
rather than the standard, more-permissive one.
This change corrects what I think must have been an oversight.

Paul, the latter two are yours.  Any objection?

        * m4/warning.m4: Use the all-permissive copyright notice
        recommended by RMS (rather than LGPL).
        * m4/vararrays.m4: Likewise.
        * m4/flexmember.m4: Likewise.

Index: m4/warning.m4
===================================================================
RCS file: /sources/gnulib/gnulib/m4/warning.m4,v
retrieving revision 1.1
diff -u -p -r1.1 warning.m4
--- m4/warning.m4       5 May 2006 07:34:51 -0000       1.1
+++ m4/warning.m4       30 Nov 2006 17:24:09 -0000
@@ -1,22 +1,10 @@
-# serial 3
+# serial 4
 # Find valid warning flags for the C Compiler.           -*-Autoconf-*-
-#
+
 # Copyright (C) 2001, 2002, 2006 Free Software Foundation, Inc.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# 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., 51 Franklin Street, Fifth Floor, Boston, MA
-# 02110-1301  USA
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.

 # Written by Jesse Thilo.

Index: m4/vararrays.m4
===================================================================
RCS file: /sources/gnulib/gnulib/m4/vararrays.m4,v
retrieving revision 1.1
diff -u -p -r1.1 vararrays.m4
--- m4/vararrays.m4     24 Oct 2006 22:32:25 -0000      1.1
+++ m4/vararrays.m4     30 Nov 2006 17:24:09 -0000
@@ -1,25 +1,13 @@
 # Check for variable-length arrays.

-#serial 1
+#serial 2

 # From Paul Eggert

 # Copyright (C) 2001 Free Software Foundation, Inc.
-
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-
-# 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., 51 Franklin Street, Fifth Floor, Boston, MA
-# 02110-1301, USA.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.

 AC_DEFUN([AC_C_VARARRAYS],
 [
Index: m4/flexmember.m4
===================================================================
RCS file: /sources/gnulib/gnulib/m4/flexmember.m4,v
retrieving revision 1.2
diff -u -p -r1.2 flexmember.m4
--- m4/flexmember.m4    7 Nov 2006 17:20:07 -0000       1.2
+++ m4/flexmember.m4    30 Nov 2006 17:24:09 -0000
@@ -1,21 +1,10 @@
+# serial 1
 # Check for flexible array member support.

 # Copyright (C) 2006 Free Software Foundation, Inc.
-
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-
-# 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., 51 Franklin Street, Fifth Floor, Boston, MA
-# 02110-1301, USA.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.

 # Written by Paul Eggert.