Improved category and course list display on front page- see bug Bug #5965 - Frontpage Category List also showing courses; new Combo List(categories + courses), fixed categories list and separate settings for not logged in / logged in users; merged from MOODLE_16_STABLE

Mimic from MOODLE_16_STABLE

Mimic from MOODLE_16_STABLE

Bug #6033 - missing string for unknown questiontype. Also tidied up some messy code. Merged from MOODLE_16_STABLE.

Bug #6116 - Quiz database upgrade scripts call renamed function by the old name. Merged from MOODLE_16_STABLE.

get_courses_page() uses get_records_sql() which means that it will actually
break if the first field requested isn't c.id. This in turn means that
the DISTINCT is not needed at all.

So let's go fast again!

Author: Donal McMullan <donal@catalyst.net.nz>

Now users can update their password correctly. We did have this before, I
wonder if it got dropped in a merge.

When using the 'internal' password handling, set auth_db_stdchangepassword
so we allow users to change their password normally.

Now Auth plugins can register auth_validate_form to get a chance
to validate config form input. Needed on MOODLE_16_STABLE to fix
a bug with auth/db.

The auth API must follow suit with the enrol API, where we can safely
do method_exists().

Bug 5840 - Image not displayed in Cloze question. Thanks to Joseph Rezeau for the fix. Merged from MOODLE_16_STABLE.

(http://moodle.org/bugs/bug.php?op=show&bugid=5986)

Merged from MOODLE_16_STABLE

(http://moodle.org/bugs/bug.php?op=show&bugid=6089)

Merged from MOODLE_16_STABLE

Bug 6111 - Rewrite the code for making an indented list of question categories, becase the existing code was so horrible. Merged from MOODLE_16_STABLE.

and added results caching to improve query time when browsing pages of the
same query. Wiki document strips (x.x.x.x) ip field from author field now.

Added hooks so that blocks can create functions that are run when they are installed and uninstalled. The base implementation does nothing.

Bug #6099 - Restore alternatively failing on data module - fixed status codes of module restore process; merged from MOODLE_16_STABLE

Bug 6101 - Automatically scroll to any errors when upgrading the database. JavaScript thanks to Andrew Walker. PHP changes are my fault.