[openssl/openssl] 0ef3e1: Force Nonstop to use fcntl(F_GETFL) in BIO_sock_nbio

[Neil Horman]

  Branch: refs/heads/openssl-3.2
  Home:   https://github.com/openssl/openssl
  Commit: 0ef3e1305db3f77bb0b0702c9b45bb39d165f28a
      https://github.com/openssl/openssl/commit/0ef3e1305db3f77bb0b0702c9b45bb39d165f28a
  Author: Neil Horman <nhorman at openssl.org>
  Date:   2023-11-14 (Tue, 14 Nov 2023)

  Changed paths:
    M crypto/bio/bio_sock.c

  Log Message:
  -----------
  Force Nonstop to use fcntl(F_GETFL) in BIO_sock_nbio

In tracking down a hang, we found that nonstop platforms were falling
into the if #ifdef FIONBIO clause in the implementation of
BIO_sock_nbio.  While the platform defines this macro, sockets set with
this continued to operate in blocking mode.  Given that the platform
also support O_NONBLOCK, adjust the ifdef to have the nonstop platform
use that method to ensure that sockets enter blocking mode

Related-To #22588

Reviewed-by: Paul Dale <pauli at openssl.org>
Reviewed-by: Tim Hudson <tjh at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22696)

(cherry picked from commit f63e1b48ac893dd6110452e70ed08f191547cd89)