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

admin/user.php

@@ -28,7 +28,7 @@
             error("SERIOUS ERROR: Could not create admin user record !!!");
         }
 
-        $admin->user = $user->id;
+        $admin->userid = $user->id;
 
         if (! insert_record("user_admins", $admin)) {
             error("Could not make user $user->id an admin !!!");
@@ -42,7 +42,7 @@
             error("Could not find site-level course");
         }
 
-        $teacher->user = $user->id;
+        $teacher->userid = $user->id;
         $teacher->course = $site->id;
         $teacher->authority = 1;
         if (! insert_record("user_teachers", $teacher)) {