Document SSL_SESSION_set_protocol_version()

=head1 NAME

SSL_SESSION_get_protocol_version - retrieve session protocol version

SSL_SESSION_get_protocol_version,

SSL_SESSION_set_protocol_version

- get and set the session protocol version

=head1 SYNOPSIS

 #include <openssl/ssl.h>

 int SSL_SESSION_get_protocol_version(const SSL_SESSION *s);

 int SSL_SESSION_set_protocol_version(SSL_SESSION *s, int version);

=head1 DESCRIPTION

SSL_SESSION_get_protocol_version() returns the protocol version number used

by session B<s>.

SSL_SESSION_set_protocol_version() sets the protocol version associated with the

SSL_SESSION object B<s> to the value B<version>. This value should be a version

constant such as B<TLS1_3_VERSION> etc. For example, this could be used to set

up a session based PSK (see L<SSL_CTX_set_psk_use_session_callback(3)>).

=head1 RETURN VALUES

SSL_SESSION_get_protocol_version() returns a number indicating the protocol

Note that the SSL_SESSION_get_protocol_version() function

does B<not> perform a null check on the provided session B<s> pointer.

SSL_SESSION_set_protocol_version() returns 1 on success or 0 on failure.

=head1 SEE ALSO

L<ssl(7)>

L<ssl(7)>,

L<SSL_CTX_set_psk_use_session_callback(3)>

=head1 HISTORY

SSL_SESSION_get_protocol_version() was first added to OpenSSL 1.1.0

SSL_SESSION_get_protocol_version() was first added to OpenSSL 1.1.0.

SSL_SESSION_set_protocol_version() was first added to OpenSSL 1.1.1.

=head1 COPYRIGHT

Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.

Copyright 2001-2017 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (the "License").  You may not use

this file except in compliance with the License.  You can obtain a copy