[SAC] If you are using download.osgeo.org for sftping use upload.osgeo.org

This is a note for those folks who upload content to download.osgeo.org

From now on please use upload.osgeo.org

For osgeo7 to hop across servers -- use hop.osgeo7.osgeo.org

We are going to be distributing the load on download.osgeo.org across
servers, so if you are using download.osgeo.org you may not be hitting the
source server.

Thanks,
Regina
SAC Administrator