SSL_CTX_sess_set_remove_cb
SSL_CTX_sess_set_remove_cb(sctx, del_session);
void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
SSL_CTX_sess_set_remove_cb(cctx, remove_session_cb);
SSL_CTX_sess_set_remove_cb(cctx, NULL);
SSL_CTX_sess_set_remove_cb(sctx, remove_session_cb);