net: fix receiver start time

Reset epoch/start time to when we get a connection.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/engines/net.c b/engines/net.c
index ff8e9e4..8957545 100644
--- a/engines/net.c
+++ b/engines/net.c
@@ -522,6 +522,7 @@
 		goto err;
 	}
 
+	reset_all_stats(td);
 	td_set_runstate(td, state);
 	return 0;
 err: