Developer credits
Git commits in Moodle 2.3.1 by Adam Olley
commit a44c303d636badaedbcbd6999c0dae07d4c6c97f Author: Adam Olley <adam.olley@netspot.com.au> Date: Tue, 28 Feb 2012 13:58:11 +0800 Tag: v2.3.1 MDL-31802: Remove section summaries from navigation_cache