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/

pkgs/tools/text/diffutils/default.nix

@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     ++ stdenv.lib.optional (stdenv.buildPlatform != stdenv.hostPlatform) "gl_cv_func_getopt_gnu=yes";
 
   meta = with stdenv.lib; {
-    homepage = http://www.gnu.org/software/diffutils/diffutils.html;
+    homepage = https://www.gnu.org/software/diffutils/diffutils.html;
     description = "Commands for showing the differences between files (diff, cmp, etc.)";
     license = licenses.gpl3;
     platforms = platforms.unix;

pkgs/tools/text/enscript/default.nix

@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
 
     license = stdenv.lib.licenses.gpl3Plus;
 
-    homepage = http://www.gnu.org/software/enscript/;
+    homepage = https://www.gnu.org/software/enscript/;
 
     maintainers = [ ];
     platforms = stdenv.lib.platforms.all;

pkgs/tools/text/gawk/default.nix

@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
   };
 
   meta = with stdenv.lib; {
-    homepage = http://www.gnu.org/software/gawk/;
+    homepage = https://www.gnu.org/software/gawk/;
     description = "GNU implementation of the Awk programming language";
 
     longDescription = ''

pkgs/tools/text/gnugrep/default.nix

@@ -41,7 +41,7 @@ stdenv.mkDerivation {
     '';
 
   meta = with stdenv.lib; {
-    homepage = http://www.gnu.org/software/grep/;
+    homepage = https://www.gnu.org/software/grep/;
     description = "GNU implementation of the Unix grep command";
 
     longDescription = ''

pkgs/tools/text/gnused/422.nix

@@ -13,7 +13,7 @@ stdenv.mkDerivation {
   outputs = [ "out" "info" ];
 
   meta = {
-    homepage = http://www.gnu.org/software/sed/;
+    homepage = https://www.gnu.org/software/sed/;
     description = "GNU sed, a batch stream editor";
 
     longDescription = ''

pkgs/tools/text/gnused/default.nix

@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   PERL = if stdenv.hostPlatform == stdenv.buildPlatform then null else "missing";
 
   meta = {
-    homepage = http://www.gnu.org/software/sed/;
+    homepage = https://www.gnu.org/software/sed/;
     description = "GNU sed, a batch stream editor";
 
     longDescription = ''

pkgs/tools/text/groff/default.nix

@@ -107,7 +107,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = http://www.gnu.org/software/groff/;
+    homepage = https://www.gnu.org/software/groff/;
     description = "GNU Troff, a typesetting package that reads plain text and produces formatted output";
     license = licenses.gpl3Plus;
     platforms = platforms.all;

pkgs/tools/text/recode/default.nix

@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    homepage = http://www.gnu.org/software/recode/;
+    homepage = https://www.gnu.org/software/recode/;
     description = "Converts files between various character sets and usages";
     platforms = stdenv.lib.platforms.unix;
     license = stdenv.lib.licenses.gpl2Plus;

pkgs/tools/text/source-highlight/default.nix

@@ -20,7 +20,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Source code renderer with syntax highlighting";
-    homepage = http://www.gnu.org/software/src-highlite/;
+    homepage = https://www.gnu.org/software/src-highlite/;
     license = stdenv.lib.licenses.gpl3Plus;
     platforms = with stdenv.lib.platforms; linux ++ darwin;
     longDescription =

pkgs/tools/text/wdiff/default.nix

@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   checkInputs = [ which ];
 
   meta = {
-    homepage = http://www.gnu.org/software/wdiff/;
+    homepage = https://www.gnu.org/software/wdiff/;
     description = "Comparing files on a word by word basis";
     license = stdenv.lib.licenses.gpl3Plus;
     maintainers = [ stdenv.lib.maintainers.eelco ];