From 4c5bf682954027e1bdb31cc9fe0ed14f8b5d4cc0 Mon Sep 17 00:00:00 2001
From: PIG208 <359101898@qq.com>
Date: Tue, 13 Apr 2021 07:15:27 +0800
Subject: [PATCH] outgoing webooks: Support adding reactions as response.

send_response_reaction is created for the sake of this feature, which is
implemented in a way similar to send_response_message. Since this change,
the outgoing webhooks will be able to respond to messages only with reactions,
though sending a response message at the same time is also supported.

Fixes: #12811