Git commits in Moodle 3.1.2 by Nick Phillips

commit a27fe6be908c5b6d9b14b51ea66557ba7d6167f3
Author: Nick Phillips <nick.phillips@otago.ac.nz>
Date:   Wed, 20 Jul 2016 12:08:54 +0800
Tag:    v3.1.2

MDL-55274 mod_chat: regain beep and / command in mod_chat.