B<certs>, B<signcert> and B<pkey> parameters can all be B<NULL> and the
B<CMS_PARTIAL> flag set. Then one or more signers can be added using the
function CMS_sign_add1_signer(), non default digests can be used and custom
-attributes added. B<CMS_final()> must then be called to finalize the
+attributes added. CMS_final() must then be called to finalize the
structure if streaming is not enabled.
=head1 BUGS