If mbox headers have CRLF linefeeds, handle them properly instead of corrupting the headers.
If mbox headers have CRLF linefeeds, handle them properly instead of
corrupting the headers.

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