New location of the "Autoconf Macro Archive"

[Peter Simons]

Hi everybody,

finally, the autoconf archive made it to the official gnu.org web
server. It is now available at:

    http://www.gnu.org/software/ac-archive/

The old location will re-direct requests to the new URL for a while,
but I'd humbly ask everybody to update the links on their pages to the
new URL.

At least the following two pages have links to the old URL:

 - http://www.gnu.org/software/autoconf/
 - http://sources.redhat.com/autoconf/

The latter also lists my e-mail address as "address@hidden".
Could you please change that to "address@hidden"?

        -peter