- Patch by Bart Jansen:

  <quote>

  This adds session support for anonymous users and fixes a bug/typo.

    1. changed rid for user #0 from 0 to 1 (rid 1 == anonymous user) to make
       inner join work.

    2. replaced "if ($user .." by "if ($user->uid .." because now $user is
       always set (my previous change probably caused this).

    3. db_next_id("user_uid") -> db_next_id("users_uid");
  </quote>

  I repeat:

  "This adds session support for anonymous users and fixes a bug/typo."