Author: Andrew Nicols
MDL-44087 mod_forum: Move forum digest to new processor
http://git.moodle.org/gw?p=moodle.git;a=commit;h=0099960560f2fcf5f9ebec1d7e353dd8f8e18bbc
http://github.com/moodle/moodle/commit/0099960560f2fcf5f9ebec1d7e353dd8f8e18bbc
+ 3.1 en [smallmessagedigest,mod_forum]