Git commits in Moodle 3.1.11 by David Mudrák

commit b061fba2c4c14c898864026b323c9eaef953cb60
Author: David Mudrák <david@moodle.com>
Date:   Mon, 05 Mar 2018 17:26:28 +0800
Tag:    v3.1.11

MDL-61392 enrol_paypal: Improve the IPN notifications handling


commit 88bd118665e5b56144db09f205cf06461bec3f49
Author: David Mudrák <david@moodle.com>
Date:   Thu, 15 Feb 2018 19:50:46 +0800
Tag:    v3.1.11

MDL-61392 enrol_paypal: Improve IPN input parameters checking


commit ea12e51d4d2cc16a81dcf2cd1463133e6e15ca4f
Author: David Mudrák <david@moodle.com>
Date:   Thu, 01 Feb 2018 06:05:22 +0800
Tag:    v3.1.11

MDL-61242 repository_equella: Fix missing class repository