So the question is: which of the 2 texts of the FDL license is the correct one? The one from 'licenses' or the one from 'standards'?
Who can clarify? Both versions are correct, the one in standards was just (slightly) older than what is in licenses. In fdl.texi RCS version 1.7, the change was made from http to https, but also changed the URL from http://www.gnu.org/copyleft/ to https://www.gnu.org/licenses/. Index: fdl-1.3.texi =================================================================== RCS file: /web/www/www/licenses/fdl-1.3.texi,v retrieving revision 1.6 retrieving revision 1.7 diff -u -p -u -r1.6 -r1.7 --- fdl-1.3.texi 3 Dec 2012 19:24:54 -0000 1.6 +++ fdl-1.3.texi 30 Sep 2017 07:14:21 -0000 1.7 @@ -6,7 +6,7 @@ @display Copyright @copyright{} 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc. -@uref{http://fsf.org/} +@uref{https://fsf.org/} Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. @@ -414,7 +414,7 @@ The Free Software Foundation may publish 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{http://www.gnu.org/copyleft/}. +@uref{https://www.gnu.org/licenses/}. Each version of the License is given a distinguishing version number. If the Document specifies that a particular numbered version of this
