[HttpKernel] Deprecate checking for cacheable HTTP methods in Request::isMethodSafe()

Author: nicolas-grekas

Http/Firewall/ExceptionListener.php

@@ -220,7 +220,7 @@ private function startAuthentication(Request $request, AuthenticationException $
     protected function setTargetPath(Request $request)
     {
         // session isn't required when using HTTP basic authentication mechanism for example
-        if ($request->hasSession() && $request->isMethodSafe() && !$request->isXmlHttpRequest()) {
+        if ($request->hasSession() && $request->isMethodSafe(false) && !$request->isXmlHttpRequest()) {
             $this->saveTargetPath($request->getSession(), $this->providerKey, $request->getUri());
         }
     }