Developer credits
Git merges in Moodle 2.3.9 by Marina Glancy
commit 8d296ea5e4c6787efd10eff767780d8a5fbec575 Author: Marina Glancy <marina@moodle.com> Date: Wed, 10 Jul 2013 10:05:16 +0800 Tag: v2.3.9 Merge branch 'm23_MDL-39832_Fix_Chrome_Issues_ETag_XSendfile_2ndRound' of https://github.com/scara/moodle into MOODLE_23_STABLE