MDL-45645 mod_lti Add custom LTI request parameter ext_user_username
MDL-45560 report_log: Close sessions before download only

If the session is closed too early, then preferences made in the body of
the page will not be saved to the session.
MDL-45767: Fixed DB error when returning to course from external tool

The instance ID is not always returned from the external
tool provider.
Automatically generated installer lang files
Automatically generated installer lang files
MDL-45763 question Random qtype should use '0' or '1' question text.

Some time ago, it when from using '0' for no-subcategories to blank.
Change to properly define '0' or '1', update old questions, and make
sure to fix newly restored questions.
MDL-45804 mod_workshop: fixed objecttable specified for the submission_reassessed event
MDL-45714 backup: Less aggressive removal of old backup dirs

The old 4 hour standard was too aggressive and can cause backup files
to be removed while they were still in use. Now the same as cron,
1 week.
MDL-42782 usability: fix for extreme course page indenting
MDL-45634 editor_atto: Adding type button to toolbar buttons

This prevents the browser to assume that those buttons are submit
buttons. In which case the submit action was stolen and the form
could not be submitted pressing the 'enter' key.
MDL-45579 group: Prevent duplicate enrolment keys in course groups
MDL-44839 admin: Moved all system executable paths to config

AMOS BEGIN
 MOV ['gspath','assignfeedback_editpdf'],['pathtogs','admin']
 MOV ['gspath_help','assignfeedback_editpdf'],['pathtogs_help','admin']
AMOS END
MDL-40851 mod_forum: Final deprecation of forum_shorten_post
MDL-45568 events: fixed the description for the 'course_module_completion_updated' event
Merge branch 'wip-mdl-44839' of git://github.com/rajeshtaneja/moodle

Conflicts:
	lib/phpunit/bootstrap.php
Merge branch 'MDL-40851-master' of git://github.com/andrewnicols/moodle
Merge branch 'MDL-45568_master' of git://github.com/markn86/moodle
MDL-18162 mod_forum: Correct @param type in phpdoc to use stdClass
MDL-45625 mod_forum: Correct typo in upgrade notes
Merge branch 'MDL-18162-master-2' of git://github.com/andrewnicols/moodle