that the pointer can become invalid when the B<ssl> is freed and
SSL_SESSION_free() is implicitly called.
SSL_get0_session() is the same as SSL_get_session().
SSL_get1_session() is the same as SSL_get_session(), but the reference
that the pointer can become invalid when the B<ssl> is freed and
SSL_SESSION_free() is implicitly called.
SSL_get0_session() is the same as SSL_get_session().
SSL_get1_session() is the same as SSL_get_session(), but the reference