Git commits in Moodle 1.9.19 by Petr Skoda

commit ef69fa6e2934cf12fa7d1250e84e39a4fef2edb7
Author: Petr Skoda <commits@skodak.org>
Date:   Sun, 13 May 2012 19:17:51 +0800
Tag:    v1.9.19

MDL-28676 add hack mysqli php ext requirement for upgrades to 2.x