Changes throughout Moodle to remove any reserved words from the

Moodle tables.

ie user -> userid in many tables, plus in user_students
   start -> starttime and end -> endtime

I've just done all this as carefully as I could ... I don't think
I missed anything but it's pretty intensive work and I'd be fooling myself
if I didn't think I'd missed a couple.

Note that this version should pretty much be able to bootstrap itself
using PostgreSQL now ... but this is untested

mod/journal/db/postgres7.php

@@ -6,14 +6,5 @@ function journal_upgrade($oldversion) {
 
     $result = true;
 
-    if ($oldversion < 20020810) {
-       if (! execute_sql("ALTER TABLE `journal_entries` ADD `mailed` INTEGER DEFAULT '0' NOT NULL")) {
-           $result = false;
-       }
-    }
-    if ($oldversion < 2002101200) {
-       execute_sql(" ALTER TABLE `journal_entries` ADD `format` INTEGER DEFAULT '0' NOT NULL AFTER `text` ");
-    }
-    
     return $result;
 }