incorrect license for dialog

[Thomas Dickey]

The license cited in

        https://guix.gnu.org/en/packages/dialog-1.3-20201126/

is incorrect.  The developer in this change

        
https://git.savannah.gnu.org/cgit/guix.git/commit/gnu/packages/ncurses.scm?id=44298269baae6cb8bbaa19e504f391c74cf5729b

was apparently unfamiliar with the exception in config.guess and config.sub:

        # 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.  This Exception is an additional permission under section 7
        # of the GNU General Public License, version 3 ("GPLv3").

Fix by deleting the line mentioning "Automake", and removing "gpl3" from
the following line:

    ;; Includes the gpl3 file "config.sub" from Automake.
    (license (list lgpl2.1 gpl3))))

-- 
Thomas E. Dickey <dickey@invisible-island.net>
https://invisible-island.net
ftp://ftp.invisible-island.net

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