MDL-44499: Fix PHP warning in upload_manager class
MDL-44246 behat: New mod_quiz test when JS is disabled
MDL-44588 quiz: fix crazy variable called $this.
MDL-44433 lang: Update the name of country code CV

ISO-3166 has updated this name to Cabo Verde:
https://www.iso.org/obp/ui/#iso:code:3166:CV
MDL-44416 Correct detail view paging
MDL-44191 hack around MySQL 5.6 inability to lower auto_increment
MDL-44299 resolve collision with session_gc() in PHP 5.6
MDL-44339 treat unexpected debugging() calls in phpunit tests as errors
MDL-44516 import htmlpurifier 4.6.0
MDL-44624 fix false failures in DML tests
MDL-44502 filelib: Add mimetype for Maple worksheets
	modified:   core.css
MDL-44356 theme_bootstrapbase: Centralize the drag and drop arrow in filemanager.
MDL-39568 gradinform_guide: show maxgrade to students when viewing marking guide
MDL-44300 force PHP 5.6.x to return raw file names for our own guessing
MDL-44635 discard error logging during ajax tests
Merge branch 'w12_MDL-44339_m26_testdebug' of git://github.com/skodak/moodle into MOODLE_26_STABLE
Merge branch 'w12_MDL-44635_m26_ajaxlogs' of git://github.com/skodak/moodle into MOODLE_26_STABLE
Merge branch 'm26_MDL-39568' of git://github.com/danmarsden/moodle into MOODLE_26_STABLE
Merge branch 'MDL-44356-M26' of git://github.com/lazydaisy/moodle into MOODLE_26_STABLE