SECURITY: Various security enhancements to password resets. They are now rate-limited by username and IP, and it is possible to disable username autofill for guests.
ALTER TABLE {{TABLE_PREFIX}}session_keys ADD COLUMN key_type smallint NOT NULL DEFAULT 0;
UPDATE {{TABLE_PREFIX}}session_keys SET key_type = 2 WHERE auth_level > 2;
ALTER TABLE {{TABLE_PREFIX}}users ADD COLUMN user_dst varchar(11) NOT NULL DEFAULT '0;0;0;0;60';
ALTER TABLE {{TABLE_PREFIX}}users ADD COLUMN user_rank_userset smallint NOT NULL DEFAULT 0;