Git commits in Moodle 3.11.1 by Ilya Tregubov

commit aeb47889fa04ff963b7deef811b47231bd84220d
Author: Ilya Tregubov <ilya@moodle.com>
Date:   Thu, 01 Jul 2021 22:42:03 +0800
Tag:    v3.11.1

weekly release 3.11+

commit 69b3669a649a2a49546cfaf62f2a6f7b3c53d4d9
Author: Ilya Tregubov <ilya@moodle.com>
Date:   Mon, 21 Jun 2021 16:11:16 +0800
Tag:    v3.11.1

MDL-71593 oauth2: Remove methods that were readded by mistake.

commit b818405c99787ef354108f2fd3210146304ac51e
Author: Ilya Tregubov <ilya@moodle.com>
Date:   Wed, 09 Jun 2021 12:06:10 +0800
Tag:    v3.11.1

MDL-70750 mod_survey: Fix warning for undefined offset.