better deal with HTTP(S) servers that respond with no headers at all, test

case 306 added to verify that we do right

lib/http.c

@@ -965,7 +965,8 @@ CURLcode Curl_http(struct connectdata *conn)
         failf(data, "Failed sending HTTP POST request");
       else
         result =
-          Curl_Transfer(conn, conn->firstsocket, -1, TRUE, bytecount,
+          Curl_Transfer(conn, conn->firstsocket, -1, TRUE,
+                        &http->readbytecount,
                         data->set.postfields?-1:conn->firstsocket,
                         data->set.postfields?NULL:&http->writebytecount);
       break;
@@ -981,7 +982,8 @@ CURLcode Curl_http(struct connectdata *conn)
         failf(data, "Failed sending HTTP request");
       else
         /* HTTP GET/HEAD download: */
-        result = Curl_Transfer(conn, conn->firstsocket, -1, TRUE, bytecount,
+        result = Curl_Transfer(conn, conn->firstsocket, -1, TRUE,
+                               &http->readbytecount,
                                -1, NULL); /* nothing to upload */
     }
     if(result)