Author: Eric Merrill
MDL-41933 Forum: Make a admin level option to set the default value of Read Tracking.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=8b73bac647087105c29735cb5cb94f9d94eac023
http://github.com/moodle/moodle/commit/8b73bac647087105c29735cb5cb94f9d94eac023
+ 2.6 en [configtrackingtype,mod_forum]