Fix for bug 2945.

(http://moodle.org/bugs/bug.php?op=show&bugid=2918)

discussion which is also not in a group, even if the course is
using groups.

upgrouped discussions and ungrouped students

Added option to cache langlist in dataroot/cache/languages. If enabled saves around 10MB of memory and 40 includes (some really large)

my tests! Sorry!
Under 1.4.x, assessments.php is always called from itself.

this script can be called from a different one (assess.php), so I've used
the 'nomatch' trick.

Fixed 'Can't save changes in editor configuration' form bug reported in http://moodle.org/mod/forum/discuss.php?d=21359

servers are buggy)

"deprecated" in new PHP versions.

Perhaps I should have used the upload manager but I'm not really sure
if it's fully available under 14_STABLE and viewing other modules
they use the $_FILES global, so I use such variable here too!

Using data_submitted() or $_POST

See bug 2828
(http://moodle.org/bugs/bug.php?op=show&bugid=2828)

between backup/restore anywhere.
(see discussion http://moodle.org/mod/forum/discuss.php?d=21044)

insert_record() - major efficiency improvements for Postgres databases on insert. Also fixed many calls to insert_record() which discard the returned record id to not ask for the record id.

add_to_log() - fixed a postgres support bug when  is set to '', and clarified the logic that decides whether to update the user_students/user_teacher records.

Another fix for my old fix for a postgres constraint that was missing a prefix.  This time we don't create it with the silly name in the first place