Git commits in Moodle 3.0.6 by Nick Phillips

commit 06c9734dc89ce360100a4fbf0c9b57ba10d4012e
Author: Nick Phillips <nick.phillips@otago.ac.nz>
Date:   Wed, 20 Jul 2016 12:08:54 +0800
Tag:    v3.0.6

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