Instead of putting dead clients on a list and checking it every loop,

use event_once to queue a callback to deal with them. Also dead clients
with references would never actually be freed because the wrap-up
functions (the callback for stdin, or status_prompt_clear) would never
be called. So call them in server_client_lost.

cmd-load-buffer.c

@@ -132,7 +132,7 @@ cmd_load_buffer_callback(struct client *c, int closed, void *data)
 		return;
 	c->stdin_callback = NULL;
 
-	c->references--;
+	server_client_deref(c);
 	if (c->flags & CLIENT_DEAD)
 		return;