[PLUGIN][WebHooks] Make request method configurable

This way, PUT can be used, which doesn't seem to be the standard, so isn't the default, but which makes sense to me, as it doesn't have a response, which we don't care about anyway

plugins/WebHooks/WebHooks.php

@@ -89,7 +89,8 @@ class WebHooks extends Plugin
             $json = str_replace('"activity":"%activity%"', '"activity":' . \Plugin\ActivityPub\Util\Model\Activity::toJson($activity), json_encode($data));
             Log::debug("WebHooks: POST {$target} on behalf of actor {$actor->getId()} ({$actor->getNickname()})", [$data, ['json' => $json]]);
             try {
-                HTTPClient::post($target, ['body' => $json, 'headers' => ['content-type' => 'application/json', 'user-agent' => 'GNU social']]);
+                $method = Common::config('plugin_webhooks', 'method');
+                HTTPClient::{$method}($target, ['body' => $json, 'headers' => ['content-type' => 'application/json', 'user-agent' => 'GNU social']]);
             } catch (Exception $e) {
                 Log::debug("WebHooks: Failed POST {$target} on behalf of actor {$actor->getId()} ({$actor->getNickname()})", [$e]);
             }

social.yaml

@@ -135,6 +135,9 @@ parameters:
       max_px: 64000
       max_file_size: 4000000
 
+    plugin_webhooks:
+      method: post
+
     theme:
       server:
       ssl: