auth: Don't assert-crash in auth-token writing if process isn't running as root.
auth: Don't assert-crash in auth-token writing if process isn't running as root.

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