It would need to be applied upstream (maybe by Karl?).
Not me, these days. Writing bug-standa...@gnu.org is the right thing to do.
It seems to me that the root of the problem is that the fdl-1.3.texi in
www is different from the fdl.texi in gnustandards. This should not ever
have happened (not that it's totally surprising that it did). -k
--- gnu/www/licenses/fdl-1.3.texi 2017-10-02 00:46:31.500194240 -0700
+++ gnu/src/gnustandards/fdl.texi 2017-11-17 00:46:56.601893371 -0800
@@ -414,7 +414,7 @@
of the GNU Free Documentation License from time to time. Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns. See
-@uref{https://www.gnu.org/licenses/}.
+@uref{https://www.gnu.org/copyleft/}.
Each version of the License is given a distinguishing version number.
If the Document specifies that a particular numbered version of this
