mark the handle as no longer having a broken pipe when a transfer has failed

lib/multi.c

@@ -1247,6 +1247,8 @@ static CURLMcode multi_runsingle(struct Curl_multi *multi,
          * then we go to completed and consider this transfer aborted.
          */
         easy->easy_handle->state.is_in_pipeline = FALSE;
+        easy->easy_handle->state.pipe_broke = FALSE;
+
         if(easy->easy_conn) {
           /* if this has a connection, unsubscribe from the pipelines */
           easy->easy_conn->writechannel_inuse = FALSE;