treewide: update homepages to https where available

Based on "problems" from repology:

https://repology.org/repository/nix_unstable/problems

Mostly simple changes to reflect redirects.

pkgs/development/python-modules/ssdeep/default.nix

@@ -25,7 +25,7 @@ buildPythonPackage rec {
   doCheck = false;
 
   meta = with stdenv.lib; {
-    homepage = http://github.com/DinoTools/python-ssdeep;
+    homepage = https://github.com/DinoTools/python-ssdeep;
     description = "Python wrapper for the ssdeep library";
     license = licenses.lgpl3;
   };