Use HTTP 1.0 instead of 1.1 for ddfs operations.

We have seen an issue in ddfs_http:http_put_conn where the connect
succeeds and returns a Socket, then sending the Head with gen_tcp:send
succeeds but the call to gen_tcp:send in send_body fails with
{badmatch,{error,closed}}.
This might be an HTTP/1.1 issue.