Subscribes commenters to an entity so they receive notifications of new comments.
License: http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
Copyright (c) 2007-2011 Cubet Technologies (http://cubettechnologies.com)
- Elgg 1.8 upgrade by Matt Beckett
- Elgg 1.9 upgrade by Juho Jaakkola