#1 Missing inserts

[Stephan Paukner]

The Anonymous user with id -1 has to be inserted
manually into the table phpbb_users.

Also, the 'Personal User' entries for the ordinary
users are missing in phpbb_groups, as well as their
matchings in phpbb_user_group, so there will be no
possibility to manage permissions on a per-user basis.
(You will get an SQL error because of the empty string
$group_id)

A hint for the documentation: The guest user from YapBB
must not be deleted in phpBB, also its user_id must not
be changed (e.g. to -1), because otherwise the
YapBB-guest's entries will disappear in phpBB.