[openssl/openssl] cac433: Add missing documentation for X509_ATTRIBUTE relat...

[Shane]

  Branch: refs/heads/openssl-3.0
  Home:   https://github.com/openssl/openssl
  Commit: cac4332244aae42e13e3f63d2efcaa3f9b245d82
      https://github.com/openssl/openssl/commit/cac4332244aae42e13e3f63d2efcaa3f9b245d82
  Author: slontis <shane.lontis at oracle.com>
  Date:   2024-01-03 (Wed, 03 Jan 2024)

  Changed paths:
    M crypto/x509/x509_req.c
    M doc/build.info
    A doc/man3/CMS_signed_get_attr.pod
    A doc/man3/EVP_PKEY_get_attr.pod
    A doc/man3/X509_ATTRIBUTE.pod
    A doc/man3/X509_REQ_get_attr.pod
    M util/missingcrypto.txt
    M util/other.syms

  Log Message:
  -----------
  Add missing documentation for X509_ATTRIBUTE related functions.

Partial fix for #8026

Reviewed-by: Tom Cosgrove <tom.cosgrove at arm.com>
Reviewed-by: Matt Caswell <matt at openssl.org>
Reviewed-by: Tomas Mraz <tomas at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22656)

(cherry picked from commit f1f0731ddf6cb31d62a2c0f406b009ae9817ed7f)