regular_board,_loop,_options,_installation...

(1) $iexist mislabeled as $IEXIST.  (2) Options to enable or disable
board IDs added.  (3) Board IDs changed to be a hashed combination of
the user_id and post_board (and will be unique to the boards they belong
to).  (3) When a user sets a password for the first time, and they've
already made posts, update the password to the posts they have already
made (as opposed to the previous method, which was to update the
password only when the user changed their original password).  (4) Post
Edit Form (_post_edit) added.