SSL_CONF_CTX_set_flags, SSL_CONF_CTX_clear_flags - Set or clear SSL
  configuration context flags
 #include <openssl/ssl.h>
 unsigned int SSL_CONF_CTX_set_flags(SSL_CONF_CTX *cctx, unsigned int flags);
 unsigned int SSL_CONF_CTX_clear_flags(SSL_CONF_CTX *cctx, unsigned int flags);
The function SSL_CONF_CTX_set_flags() sets flags in the context
  cctx.
The function SSL_CONF_CTX_clear_flags() clears flags
    in the context cctx.
The flags set affect how subsequent calls to SSL_CONF_cmd() or
  SSL_CONF_argv() behave.
Currently the following flags values are recognised:
  - SSL_CONF_FLAG_CMDLINE, SSL_CONF_FLAG_FILE
- recognise options intended for command line or configuration file use. At
      least one of these flags must be set.
- SSL_CONF_FLAG_CLIENT, SSL_CONF_FLAG_SERVER
- recognise options intended for use in SSL/TLS clients or servers. One or
      both of these flags must be set.
- SSL_CONF_FLAG_CERTIFICATE
- recognise certificate and private key options.
- SSL_CONF_FLAG_REQUIRE_PRIVATE
- If this option is set then if a private key is not specified for a
      certificate it will attempt to load a private key from the certificate
      file when SSL_CONF_CTX_finish() is called. If a key cannot be
      loaded from the certificate file an error occurs.
- SSL_CONF_FLAG_SHOW_ERRORS
- indicate errors relating to unrecognised options or missing arguments in
      the error queue. If this option isn't set such errors are only reflected
      in the return values of SSL_CONF_set_cmd() or
      SSL_CONF_set_argv()
SSL_CONF_CTX_set_flags() and SSL_CONF_CTX_clear_flags() returns
  the new flags value after setting or clearing flags.
ssl(7), SSL_CONF_CTX_new(3), SSL_CONF_CTX_set_ssl_ctx(3),
  SSL_CONF_CTX_set1_prefix(3), SSL_CONF_cmd(3),
  SSL_CONF_cmd_argv(3)
These functions were added in OpenSSL 1.0.2.
Copyright 2012-2016 The OpenSSL Project Authors. All Rights Reserved.Licensed under the Apache License 2.0 (the "License").
    You may not use this file except in compliance with the License. You can
    obtain a copy in the file LICENSE in the source distribution or at
    <https://www.openssl.org/source/license.html>.