don't hardcode protocol when downloading dcf file
don't hardcode protocol when downloading dcf file

From: Dan Tenenbaum <dtenenba@fhcrc.org>

git-svn-id: b54cb9a21d567fd88861a49b900e1162c163fec7@116896 bc3139a8-67e5-0310-9ffc-ced21a209358

Bioconductor/Bioconductor