MDL-47975 assign: Stop gap fix for random time fails.
MDL-30968 mod/forum Fixed group link
MDL-47391 Update pagelayout for default profile configuration
MDL-39692 grade: Ability to delete letter boundary
MDL-39692 grade: Little code clean up of letter boundary deletion
MDL-39376 enrol: Optimized setting for ldap and database
MDL-48156 task: Skip the scheduled task only for really disabled plugins
MDL-48093 HTML 5 video: Firefox now supports .mp4
MDL-48143 backup: Bump release to 2.9 dev branch
Merge branch 'MDL-48143' of git://github.com/stronk7/moodle
MDL-48144 upgrade: add v2.8.0 sep lines
MDL-48168 quiz editing: max grade should be editable after attempts

Note that there was a lot of legacy code left from Moodle 2.7 which is
no longer required, and I took this opportunity to delete it.
MDL-43628 assign: make submissionagreement usable on multilingual sites
MDL-35638 backup: Do not print headers during redirects
Merge branch 'MDL-48144' of git://github.com/stronk7/moodle
MDL-48174 core_lang: support for ->skiplangupgrade in lang cron task

Similar to upgrade_language_pack(), update_langpacks_task should
respect skiplangupgrade config. Also, this should be added to behat
whitelist, so it can be disabled during on-sync period, when lang
pack for master is not available.
Merge branch 'MDL-48156-master-pluginisenabled' of git://github.com/mudrd8mz/moodle
Merge branch 'MDL-39376-master' of git://github.com/FMCorz/moodle
Merge branch 'MDL-48168' of git://github.com/timhunt/moodle
Merge branch 'MDL-48093-master' of https://github.com/sammarshallou/moodle