qgis/QGIS — pull request #1499 by giohappy (2014-07-05 10:04:20+00:00)
Title: give the option to turn QgsMessageLog loggin on and off

Being a singleton instance I'm not sure if it's ok to make it turnable on/off globally, because it could happen that a plugin turns it off and forget to turni it on again. The other parts of QGIS should query it with isActivated.
Should we make it available only from the GUI? Mmm....