auth: Fixed prefetch userdb interaction with passdb changing username. If userdb_* fields were set before user was changed, prefetch returned the unchanged username.
auth: Fixed prefetch userdb interaction with passdb changing username.
If userdb_* fields were set before user was changed, prefetch returned
the unchanged username.

LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot