Use patched version of h.r.download

It does not destroy buildout contract, so there is no need for local downloads
directory.

stack/erp5.cfg

@@ -6,6 +6,7 @@ extensions =
 
 find-links =
     http://www.nexedi.org/static/packages/source/slapos.buildout/
+    http://www.nexedi.org/static/packages/source/hexagonit.recipe.download/
     http://dist.repoze.org
     http://www.nexedi.org/static/packages/source/
     http://www.owlfish.com/software/wsgiutils/download.html
@@ -520,7 +521,9 @@ fpconst = 0.7.2
 gitdb = 0.5.4
 greenlet = 0.3.4
 hexagonit.recipe.cmmi = 1.5.0
-hexagonit.recipe.download = 1.5.0
+# Use patched hexagonit.recipe.download from
+# https://github.com/SlapOS/hexagonit.recipe.download
+hexagonit.recipe.download = 1.5.1-dev-slapos-001
 http-parser = 0.7.5
 huBarcode = 0.63
 inotifyx = 0.2.0