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/zope_size/default.nix

@@ -17,7 +17,7 @@ buildPythonPackage rec {
   propagatedBuildInputs = [ zope_i18nmessageid zope_interface ];
 
   meta = with stdenv.lib; {
-    homepage = http://github.com/zopefoundation/zope.size;
+    homepage = https://github.com/zopefoundation/zope.size;
     description = "Interfaces and simple adapter that give the size of an object";
     license = licenses.zpl20;
     maintainers = with maintainers; [ goibhniu ];