Treewide: use HTTPS on GNU domains

HTTP -> HTTPS for :
- http://gnu.org/
- http://www.gnu.org/
- http://elpa.gnu.org/
- http://lists.gnu.org/
- http://gcc.gnu.org/
- http://ftp.gnu.org/ (except in fetchurl mirrors)
- http://bugs.gnu.org/

doc/languages-frameworks/haskell.section.md

@@ -935,7 +935,7 @@ The implementation can be found in the
 [integer-gmp](http://hackage.haskell.org/package/integer-gmp) package.
 
 A potential problem with this is that GMP is licensed under the
-[GNU Lesser General Public License (LGPL)](http://www.gnu.org/copyleft/lesser.html),
+[GNU Lesser General Public License (LGPL)](https://www.gnu.org/copyleft/lesser.html),
 a kind of "copyleft" license. According to the terms of the LGPL, paragraph 5,
 you may distribute a program that is designed to be compiled and dynamically
 linked with the library under the terms of your choice (i.e., commercially) but