Git commits in Moodle 2.6.x by Julien Boulen

commit c7bcbf6fe3684e14869dbc277db66d15302c7653
Author: Julien Boulen <julien.boulen@uhb.fr>
Date:   Wed, 08 Oct 2014 19:56:31 +0800
Tag:    v2.6.6

MDL-47584 database SQL: add debug info on connection error notices

commit 3f1e846902ef4c93670cf5a542aae6e86dcf8e32
Author: Julien Boulen <julien.boulen@uhb.fr>
Date:   Tue, 02 Sep 2014 15:15:08 +0800
Tag:    v2.6.6

MDL-46984 core_course: added grouping name for activities with no link