ALL: updated m4 distribution format

The markup format distributed by the Autoconf Macro Archive underwent
the following changes:

 * All archive entries use '#' comment delimiters, rather than 'dnl',
   because we would like those comments to go into the generated
   configure script. It should be simple for everyone to determine
   where the macro came from originally, who wrote it, and where the
   latest version can be retrieved. To achieve this, every macro used
   to start with a distinguished line that shows the URL of its
   respective home page, i.e.:

   | ##### http://autoconf-archive.cryp.to/ax_prog_acme.html

   As it happens, the aclocal utility distributed with Automake
   ignores all comment lines that start with a double hash '##', thus
   those home page URLs will not make it into any automatically
   generated aclocal.m4 file. Duh. To remedy the situation, the
   following markup is now used instead:

   | # =================================================================
   | #        http://autoconf-archive.cryp.to/ax_prog_acme.html
   | # =================================================================

 * The 2.x versions of the GNU GPL and LGPL contain the following
   clause:

   | You should have received a copy of the <GNU LICENSE NAME> along
   | with this program; if not, write to the Free Software Foundation,
   | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

   Version 3.x, however, smartly refers the reader to the Web:

   | You should have received a copy of the GNU General Public License
   | along with this program. If not, see <http://www.gnu.org/licenses/>.

   This patch changes all GPL2 and LGPL2 macros to do the same, i.e.
   to refer to the GNU web site for the full text of the respective
   license. 

 * Since all m4 files had to be changed in this commit anyway, the
   opportunity was used to increase the auto-fill column for
   documentation from 65 to 75 characters per line. It's a trivial
   change, but it just looks nicer.

1 files changed, 18 insertions, 17 deletions

diff --git a/m4/ax_check_gd.m4 b/m4/ax_check_gd.m4
index 9381900..5baefdf 100644
--- a/m4/ax_check_gd.m4
+++ b/m4/ax_check_gd.m4
@@ -1,4 +1,6 @@
-##### http://autoconf-archive.cryp.to/ax_check_gd.html
+# ===========================================================================
+#              http://autoconf-archive.cryp.to/ax_check_gd.html
+# ===========================================================================
 #
 # SYNOPSIS
 #
@@ -8,32 +10,31 @@
 #
 #   Check for the gd library. (See http://www.boutell.com/gd/) If gd is
 #   found, the output variables GD_CFLAGS, GD_LDFLAGS and GD_LIBS will
-#   contain the compiler flags, linker flags and libraries necessary to
-#   use gd; otherwise, those variables will be empty. In addition, the
-#   symbol HAVE_GD is defined if the library is found, and the symbols
-#   HAVE_GD_GIF, HAVE_GD_JPEG and HAVE_GD_PNG are defined if the
-#   lirbary supports creating images in gif, jpeg and png formats,
-#   respectively.
+#   contain the compiler flags, linker flags and libraries necessary to use
+#   gd; otherwise, those variables will be empty. In addition, the symbol
+#   HAVE_GD is defined if the library is found, and the symbols HAVE_GD_GIF,
+#   HAVE_GD_JPEG and HAVE_GD_PNG are defined if the lirbary supports
+#   creating images in gif, jpeg and png formats, respectively.
 #
-#   The user may use --with-gd=no or --without-gd to skip checking for
-#   the library. (The default is --with-gd=yes.) If the library is
-#   installed in an unusual location, --with-gd=DIR will cause the
-#   macro to look for gdlib-config in DIR/bin or, failing that, for the
-#   headers and libraries in DIR/include and DIR/lib.
+#   The user may use --with-gd=no or --without-gd to skip checking for the
+#   library. (The default is --with-gd=yes.) If the library is installed in
+#   an unusual location, --with-gd=DIR will cause the macro to look for
+#   gdlib-config in DIR/bin or, failing that, for the headers and libraries
+#   in DIR/include and DIR/lib.
 #
 #   Feedback welcome!
 #
 # LAST MODIFICATION
 #
-#   2005-09-22
+#   2008-04-12
 #
 # COPYLEFT
 #
-#   Copyright (c) 2005 Nick Markham <markhn@rpi.edu>
+#   Copyright (c) 2008 Nick Markham <markhn@rpi.edu>
 #
-#   Copying and distribution of this file, with or without
-#   modification, are permitted in any medium without royalty provided
-#   the copyright notice and this notice are preserved.
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved.
 
 AC_DEFUN([AX_CHECK_GD], [
 	AC_ARG_WITH(gd,