Merge branch 'MDL-29471-MOODLE_21_STABLE' of git://github.com/mouneyrac/moodle into MOODLE_21_STABLE
Merge branch 'wip-MDL-30709-MOODLE_21_STABLE' of git://github.com/marinaglancy/moodle into MOODLE_21_STABLE
MDL-30709 mod_assignment Fixed phpdocs for assignment_get_file_info
Merge branch 'MDL-30911_m21' of git://github.com/rwijaya/moodle into MOODLE_21_STABLE
MDL-31541 Repositories - make sure all repository instances have unique 'sortorder' values when retrieved
MDL-30521 blog: Updated uniquehash field preceision to 255 in post table
Merge branch 'wip-mdl-28101-m21' of git://github.com/rajeshtaneja/moodle into MOODLE_21_STABLE
MDL-29667 Plugins overview shows incorrect availability for auth & enrol plugins

We store the enabled plugins as array values but later look them up as array
keys. Just flip the array when we build it.
MDL-31527 XMLDB Editor - make sure default tables are created with correct plugin prefix
MDL-29402 QandA forum questions should be emailed
MDL-30709 mod_assignment: Renamed callback to mod_assignment_get_file_info
Automatically generated installer lang files
MDL-31495 Performance improvement in question engine upgrade SQL
[MDL-31386] Correctly order answers in a lesson backup
MDL-30388 Blocks: Search view for block instances fixed, with proper page url and pagination
MDL-30388 Blocks: navigation block is visible on block search page
Merge branch 'wip-mdl-30388-m21' of git://github.com/rajeshtaneja/moodle into MOODLE_21_STABLE
MDL-30888 course-search: Fixed typo
MDL-30495 HTML5 apps cannot call Webservices functions if a HTTP resource is retrieved from the Moodle installation
MDL-31556 Lesson Module: fixed missing 'lesson closes' event in calendar