Git commits in Moodle 3.5.1 by Sergio Rabellino

commit af344834e1c273d19c40e9b0c1717a54935cb298
Author: Sergio Rabellino <sergio.rabellino@di.unito.it>
Date:   Thu, 28 Jun 2018 15:23:51 +0800
Tag:    v3.5.1

MDL-61403 filter: Fix for the nolink tag ignored