MDL-32316 feedback: fix tem type label does honor trusted text
MDL-32379: Fix memory leak in session_set_user

session_set_user mistakingly sets the session user to be a reference to the passed object.

This is a problem when alot of data is attached to the session user object,
as any process holding a list of these users will use more memory each time it changes user.
MDL-32393 navigation: Fixed up issue when rendering action_link instances for the navigation
MDL-27547 When deleting a local plugin containing a built-in service, the built-in service is not deleted
MDL-32388 SCORM: Fix chrome pop-ups
MDL-30819 grade: fixed column highlighting on the grader report
MDL-30955 rating: corrected /rating/index.php as it was determining the maximum rating incorrectly for custom scales
MDL-30026 improve session lock acquire timeouts and other minor cleanup

This is partially based on original patch by Tony Levi.
MDL-30026 improve session lock - unit tests & minor comment fixup
MDL-30026 improve session lock - mssql workaround for bug with scalar returned values
MDL-30026 improve session lock - stronger detection for oracle
MDL-30026 dml - fix sqlsrv support for session locks
MDL-32353 backup: Flaw in settings logic for user info and anonymise
MDL-25660 workshop registers events in the calendar
MDL-25660 recreate all workshop calendar events

Due to complex workshop upgrade path from 1.9 and missing calendar events
support in 2.x, the only safe way to get rid of potentially invalid
calendar events (such as those reported in MDL-26687) is to remove all
current workshop events and recreate them from scratch.
MDL-25660 workshop removes its calendar events on instance deletion
Automatically generated installer lang files
MDL-32385 theme_base: adds line-height:normal in style/course.css for section summary
MDL-32404 question export: missing error message when exporting an empty category.
MDL-32442 questionupgrade: error in SQL from postgres systems