fs layout: Don't "File name too long" errors if giving too long path to LIST.
fs layout: Don't "File name too long" errors if giving too long path to LIST.

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