Permission notice for Emacs 23 missing CEDET grammar files.

diff --git a/licenses/Emacs-23-CEDET-grammars b/licenses/Emacs-23-CEDET-grammars
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+Correcting legal consequences of our mistake in Emacs 23.2 and 23.3
+http://lists.gnu.org/archive/html/info-gnu-emacs/2011-08/msg00003.html
+
+The FSF hereby grants permission to distribute the old Emacs 23.2 and
+23.3 releases, notwithstanding the absence therein of the real source
+files for the CEDET parsers (the grammar files).  This permission
+extends to versions with unrelated modifications, provided those
+versions comply with GNU GPL version 3 in all other respects.
+
+Thanks to some of the improvements in GPL version 3, we don't need to
+explicitly forgive past violations caused by redistributing Emacs 23.2
+and 23.3, because those violations would only have consequences for
+the redistributors if the FSF were to complain about them to the
+redistributors within 60 days of such redistribution.  The FSF commits
+not to complain about this problem.
+
+The FSF urges all redistributors to upgrade as soon as possible to the
+revised Emacs 23.2 and 23.3 releases, now in ftp.gnu.org, which do not
+have this problem.  The corrected files have 23.2a and 23.3a in their
+names.