istream-header-filter: Fixes handling HEADER_FILTER_END_BODY_WITH_LF correctly.
istream-header-filter: Fixes handling HEADER_FILTER_END_BODY_WITH_LF correctly.

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