kike: mark an issue with FIXME

kike.c

@@ -601,6 +601,10 @@ server_context_free (struct server_context *self)
 	for (link = self->clients; link; link = tmp)
 	{
 		tmp = link->next;
+		// FIXME: either make sure this isn't called (which it can as of now,
+		//   see on_irc_quit_timeout) or fix client_free() to unregister from
+		//   the poller before closing the socket (we could also just
+		//   set .closed = true).
 		client_free (link);
 		free (link);
 	}