[openssl/openssl] e30dcc: Allow duplicate CMS attributes

[Tomáš Mráz]

  Branch: refs/heads/openssl-3.0
  Home:   https://github.com/openssl/openssl
  Commit: e30dcc17ae3d9b3503f342b0abe91b7edc84f9da
      https://github.com/openssl/openssl/commit/e30dcc17ae3d9b3503f342b0abe91b7edc84f9da
  Author: Tomas Mraz <tomas at openssl.org>
  Date:   2024-01-03 (Wed, 03 Jan 2024)

  Changed paths:
    M crypto/cms/cms_att.c
    M crypto/x509/x509_att.c
    M include/crypto/x509.h

  Log Message:
  -----------
  Allow duplicate CMS attributes

Fixes regression introduced with https://github.com/openssl/openssl/pull/21505

Fixes #22266

Reviewed-by: Shane Lontis <shane.lontis at oracle.com>
Reviewed-by: Richard Levitte <levitte at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23029)

(cherry picked from commit d7e707cb4983a35b1a265c6042da410d829f3b19)