new directory with license notices

[Bruno Haible]

In preparation of the change of license notices, I'm adding suitable
license notices, ready for copy&paste into the source files.

While the vast majority of source files talk about "This program ...",
config.guess and config.sub talk about "This file ...". I adopt this change
for Gnulib, because Gnulib files are very often copied into other packages,
and we want to avoid the impression that the entire package is under a
weaker license than it actually is.


2021-06-04  Bruno Haible  <bruno@clisp.org>

        New directory with license notices.
        * etc/license-notices/*: New files.

0001-New-directory-with-license-notices.patch
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