Allow LP to reset block detect and block detect lp flags to know who really came first.

main.c

@@ -2073,8 +2073,6 @@ static void restart_threads(void)
 {
 	int i, stale;
 
-	block_changed = BLOCK_NONE;
-
 	/* Discard staged work that is now stale */
 	stale = discard_stale();
 
@@ -4115,11 +4113,6 @@ static void *watchdog_thread(void *userdata)
 			mutex_unlock(&curses_lock);
 		}
 
-		if (unlikely(work_restart[watchdog_thr_id].restart)) {
-			restart_threads();
-			work_restart[watchdog_thr_id].restart = 0;
-		}
-
 		gettimeofday(&now, NULL);
 
 		for (i = 0; i < total_pools; i++) {