MDL-37564 linked dependant plugin component text to plugins DB
MDL-38794 passed overflowdiv parameter
MDL-37804 mod/assign: Students no longer able to submit files after due date with Prevent late submissions turned on.
MDL-40262 theme_formal_white: I simply assigned black (that is well contrasted according to http://snook.ca/technical/colour_contrast/colour.html) to links and white (that makes a not compliant contrast with background color) to plain texts in the breadcrumb. This is the less expensive solution I found to differentiate plain text and links and have links well contrasted.
MDL-41071 core: plugininfo_mod caches in plugininfo_mod definition
MDL-40952 skip only the opcache requirement in environment test

Please note we need other optional extensions and settings because otherwise some tests fail without explanation.
MDL-41094 purge caches only before and after upgrade of plugins

It should not be necessary to purge before/after individual plugins
because caches are disabled during install and upgrade.
MDL-41112 fix theme and js caching info in config-dist.php
MDL-41117 theme_formal_white: fixed border around header of course categories and sub-categories
MDL-41125 course: Only require dndupload library when necessary
MDL-41122: Trim on RSS body to prevent Remote RSS block from failing on valid feeds
MDL-41136 badges: Prevent extra loading due to unnecessary includes
MDL-39474 introduce $CFG->debugdeveloper and cleanup $CFG init
MDL-41146 Backup: backup_includes_files can leak memory
MDL-41159 theme: Remove z-index from file manager context menu icon
MDL-29004 Wiki: display images in printer-friendly view
MDL-39956 cohort: Convert to new events

* \core\event\cohort_created
* \core\event\cohort_updated
* \core\event\cohort_deleted
* \core\event\cohort_member_added
* \core\event\cohort_member_removed
MDL-39956 cohort: Add tests for new events
MDL-39956 cohort: Event clean up and made ready for integration

* Added more PHP Documentation
* Localised strings for get_name()
* get_legacy_eventname() is now static
* get_legacy_eventdata() is now protected
* Testing legacy event data
* Added missing defined('MOODLE_INTERNAL') checks
* Added missing call to add_record_snapshot()
MDL-41157 calendar: add unit tests for calendar_get_course_cached