The curl block driver accepts more options than just "filename"; also,
the URL is actually expected to be passed through the "url" option
instead of "filename".
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20170331120431.1767-2-mreitz@redhat.com
Signed-off-by: Jeff Cody <jcody@redhat.com>