MDL-68524 js: Add prefetch module

on-demand release 3.9dev+

Merge branch 'install_master' of https://git.in.moodle.com/amosbot/moodle-install

Merge branch 'MDL-68328-dlfix' of https://github.com/cengage/moodle

MDL-68328 mod_lti: resourcekey and pwd hidden not removed

Merge branch 'MDL-66135' of https://github.com/paulholden/moodle

MDL-66135 tool_uploadcourse: case-insensitive date string comparison.

Account for PM/pm differences in PHP on different OS.

Merge branch 'MDL-67798-master-fix' of git://github.com/andrewnicols/moodle

MDL-67798 contentbank: Sort data before comparison

Merge branch 'MDL-68492-master' of https://github.com/sammarshallou/moodle

MDL-67798 contentbank: Whitespace fixes

Merge branch 'MDL-67798-master' of git://github.com/cescobedo/moodle

Merge branch 'master_MDL-67540' of https://github.com/golenkovm/moodle

Merge branch 'MDL-68506-master' of git://github.com/andrewnicols/moodle

Merge branch 'MDL-57680' of https://github.com/timhunt/moodle

MDL-67850 quizaccess: change SEB supported versions

MDL-67850 quizaccess: fix broken unit tests

MDL-67850 quizaccess: remove invalid white spaces

MDL-67850 lib: remove trailing slash for plist

Merge branch 'MDL-43156' of https://github.com/stronk7/moodle

Merge branch 'MDL-66135' of https://github.com/paulholden/moodle

MDL-68329 cache: Improve cache performance footer info

MDL-66135 tool_uploadcourse: support custom course fields.

Merge branch 'MDL-68328-dlfix' of https://github.com/cengage/moodle

Merge branch 'MDL-68427-master' of git://github.com/andrewnicols/moodle

MDL-43156 core_form: fix handling of fixture form

Also moving it from behat_forms to behat_navigation

MDL-43156 formslib: newly-created repeat elements get the default values

Merge branch 'MDL-66732' of https://github.com/paulholden/moodle

Merge branch 'MDL-67075-redis-session-locks' of https://github.com/brendanheywood/moodle

Merge branch 'MDL-68404-master' of git://github.com/lucaboesch/moodle

MDL-67075 session: Added extra debugging of blocking redis session locks

Merge branch 'MDL-68309-master' of https://github.com/snake/moodle

Merge branch 'MDL-67850-seb-integration-3' of https://github.com/catalyst/moodle

Automatically generated installer lang files

Merge branch 'MDL-68434-master-enfix' of git://github.com/mudrd8mz/moodle

MDL-68434 lang: Use the updated terminology in the tests

Merge branch 'MDL-68442-master' of git://github.com/andrewnicols/moodle

MDL-67850 quizaccess: remove the old quizaccess_safebrowser

Co-authored-by: Nicholas Hoobin <nicholashoobin@catalyst-au.net>
Co-authored-by: Andrew Madden <andrewmadden@catalyst-au.net>

MDL-67850 quizaccess: add Safe Exam Browser access rule plugin

Co-authored-by: Nicholas Hoobin <nicholashoobin@catalyst-au.net>
Co-authored-by: Dmitrii Metelkin <dmitriim@catalyst-au.net>

MDL-67850 lib: add new plist library

Co-authored-by: Nicholas Hoobin <nicholashoobin@catalyst-au.net>
Co-authored-by: Dmitrii Metelkin <dmitriim@catalyst-au.net>

Merge branch 'MDL-68433-adhoc-task-lookahead' of https://github.com/brendanheywood/moodle

Merge branch 'MDL-68378-master' of git://github.com/rezaies/moodle

Merge branch 'MDL-64417' of https://github.com/paulholden/moodle

Merge branch 'MDL-68329-cache-info' of https://github.com/brendanheywood/moodle

Merge branch 'MDL-67915-master' of git://github.com/lameze/moodle

MDL-68328 mod_lti: use hidden form when deeplink options disabled

MDL-68404 gradingform_rubric: Style "Add level" button.

Merge branch 'MDL66035_master' of https://github.com/jwalits/moodle

MDL-68434 lang: Import fixed English strings (en_fix)

Significant string changes:

* pluginnamesummary,qtype_ddimageortext and
  pluginnamesummary,qtype_ddmarker - Note about the question type not
  being accessible to visually impaired users

* addresourceoractivity,core - Removing 'resource' as the new activity
  chooser doesn't have resource types separated

Merge branch 'MDL-68445' of https://github.com/stronk7/moodle

on-demand release 3.9dev+

NOBUG: Fixed SVG browser compatibility

Merge branch 'install_master' of https://git.in.moodle.com/amosbot/moodle-install

Merge branch 'MDL-68525-master' of git://github.com/andrewnicols/moodle

Merge branch 'MDL-66259' of https://github.com/stronk7/moodle

Merge branch 'MDL-67316' of https://github.com/stronk7/moodle

Merge branch 'MDL-68047' of https://github.com/stronk7/moodle

Merge branch 'MDL-68342-xsendfile-file' of https://github.com/brendanheywood/moodle

MDL-68525 behat: chrome/switches caps not allowed in Chrome > 81

Now we need to use extra_capabilities/chromeOptions/args instead

The former was deprecated long ago, it seems that Chrome 81 has
stopped accepting it. The later seems to be working at very least
since Chrome 76 (haven't gone further back).

MDL-68442 user: Add notifications on unenrol/update

MDL-68442 user: Rewrite participant status to work with dynamic tables

MDL-68442 user: Rewrite enrolment actions as ES6

MDL-68329 cache: Improve cache performance footer info

Merge branch 'MDL-68383-master' of git://github.com/bmbrands/moodle

Merge branch 'MDL-68477-master' of git://github.com/lameze/moodle

Merge branch 'master' of https://github.com/DrCuriosity/moodle

Merge branch 'MDL-67797-master' of git://github.com/sarjona/moodle

Merge branch 'MDL-68393-master-availableupdateui' of git://github.com/mudrd8mz/moodle

Merge branch 'MDL-67701-master' of git://github.com/ferranrecio/moodle

Merge branch 'MDL-68515-master-report_status_standard' of git://github.com/mudrd8mz/moodle

Merge branch 'MDL-65967-master' of https://github.com/danielneis/moodle

MDL-68342 files: Add a faster xsendfile method to avoid db lookups

Automatically generated installer lang files

MDL-66035 message: Restore missing message preferences files

MDL-57680 form autocomplete: extend Behat tests

MDL-57680 form autocomplete: fix triggering change event

MDL-57680 form autocomplete: let singleselects be cleared.

This was already working after ajax had refreshed the choices, it was just
broken on first page load.

MDL-67540 quiz: Start transaction before selecting existing slots.

Co-authored-by: Conn <conn@cmrwarwicker.com>

MDL-65967 tool_recyclebin: add recycle bin link to category edit menu

Merge branch 'MDL-68514-master' of git://github.com/sarjona/moodle

MDL-68515 admin: Mark the system status report as a standard plugin

MDL-68514 contentbank: fix behat issues with classic

MDL-67798 core_contentbank: Add privacy provider

MDL-68445 behat: Bump to 3.6.x

composer.lock generated with PHP 7.2, following:

https://docs.moodle.org/dev/Composer#How_to_prepare_and_submit_composer_changes

Also, ensure Symfony/Process > 4.0 compatibility
(needed for parallel runs)

MDL-67316 ldap: Pass correct hex chars to hexdec()

Before php74 they were silently discarded, now they
show a deprecation message.

MDL-67316 typo3: Pass correct hex chars to hexdec()

Typo3 was relaying on the feature of base converter
functions silently removing invalid chars so, for example:

'U+00A0' => '00A0' => 160

Since php74, the existence of those invalid chars do produce
a deprecation warning, no matter the outcome continues being the same.

So, here, we are just converting that invalud 'U+' by '0x'

MDL-66259 qtypes: Add missing comment on get_random_guess_score

A bit off-topic for this issue number, but I noticed it while
working on this, and though it was not worth creating a
separate MDL for.

MDL-66259 qtype_numerical: remove no-longer relevant todo I noticed

MDL-66259 qtypes: get_question_options() always call parent::

To get the question->options initialised, children must
call parent::get_question_options() always. Also, it is
just general good practice. Subclasses are meant to be
adaptations of the base class, not something completely
different.

Note, there are some changes in the data structure
produced (see changes in the tests) but these changes
are not wrong.

MDL-66259 quiz responses: fix unrealistic test setup

MDL-66259 qtype: add tests to all remaining involved qtypes

That way we get the load_question_data() method covered
and all the main data, options, hints checked.

MDL-66259 qtype_truefalse: unit test of loading questions from the DB

This is about to be changes, so we need a test first to catch regressions.

MDL-68492 Behat: Use faster direct link steps in lib/tests/behat

MDL-68492 Behat: Direct URL links for courses, activities

MDL-67915 core_table: add support for hide and show of columns

MDL-66135 customfield: allow calling code to set form category headings.

MDL-66135 customfield: method to allow fields to parse values.

This is useful when the value is coming from an external source (e.g. course upload tool).

MDL-67797 contentbank: review class_exists uses

MDL-67797 contentbank: use the search_contents method

MDL-67797 contentbank: add search_contents method