[openssl/openssl] b4a33b: Don't error if s_client receives exactly BUFSIZZ data

[Matt Caswell]

  Branch: refs/heads/openssl-3.2
  Home:   https://github.com/openssl/openssl
  Commit: b4a33ba9aaf8022589dd15261f41d35729277a68
      https://github.com/openssl/openssl/commit/b4a33ba9aaf8022589dd15261f41d35729277a68
  Author: Matt Caswell <matt at openssl.org>
  Date:   2023-11-01 (Wed, 01 Nov 2023)

  Changed paths:
    M apps/s_client.c

  Log Message:
  -----------
  Don't error if s_client receives exactly BUFSIZZ data

We should accept that many bytes without failing

Fixes #22551

Reviewed-by: Hugo Landau <hlandau at openssl.org>
Reviewed-by: Tom Cosgrove <tom.cosgrove at arm.com>
(Merged from https://github.com/openssl/openssl/pull/22558)

(cherry picked from commit 74ff15e1a1987686812c465ee3200bc25efa0e8f)