Developer credits
Git commits in Moodle 3.4.x by Viktor
commit b77dcd23d8e39265b5c096f0d947764c02d832c8 Author: Viktor <viktor.khokhryakov@gmail.com> Date: Mon, 04 Feb 2019 16:10:25 +0800 Tag: v3.4.8 MDL-62702 core_lib: fix broken verification signature