Seek also non-seekable parent streams to current offset as long as we're not seeking backwards.
Seek also non-seekable parent streams to current offset as long as we're not
seeking backwards.

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