Treewide: update some problematic homepages

These URLs are reported as problematic by Repology.
It could be a permanent redirection
or the page does not exist anymore

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

@@ -19,7 +19,7 @@ buildPythonPackage rec {
 
   meta = with stdenv.lib; {
     description = "Simple, lightweight, and easily extensible STOMP message broker";
-    homepage = http://code.google.com/p/coilmq/;
+    homepage = "https://github.com/hozn/coilmq/";
     license = licenses.asl20;
   };
 }