Developer credits
Git commits in Moodle 2.6.2 by Oleg Sychev
commit c5a229c2f1d5d5f4c9ff0dd259f59ca8c420db39 Author: Oleg Sychev <oasychev@gmail.com> Date: Sat, 25 Jan 2014 07:41:01 +0800 Tag: v2.6.2 MDL-42456: add Mercurial vcs support to plugin_external_source