MDL-43852 Filters Fixed naked-OR conditions.
MDL-29409 repository_alfresco: Drop support for URL/link

The current solution has two major issues. Firstly, it is using the
session key in the file URL, allowing anyone with the link to steal
the identify of the poster. Secondly, the links are not presistent
and become broken as soon as the server is restarted. Let's not
support this any more until a proper solution is found in MDL-26454.
MDL-43146 enrol_imsenterprise: missing sesskey protection
Merge branch 'm27_MDL-43852_SWF_Not_Embedded_By_Mediaplugin_Filter' of https://github.com/scara/moodle