default void upgrade(
            ManagedHttpClientConnection conn,
            HttpHost endpointHost,
            NamedEndpoint endpointName,
            Object attachment,
            HttpContext context) throws IOException {
        upgrade(conn, endpointHost, context);
    }
Upgrades transport security of the given managed connection
by using the TLS security protocol.

@param conn the managed connection.
@param endpointHost the address of the remote endpoint.
@param endpointName the name of the remote endpoint, if different from the endpoint host name,
                  {@code null} otherwise. Usually taken from the request URU authority.
@param attachment connect request attachment.
@param context the execution context.

@since 5.2
httpclient5/src/main/java/org/apache/hc/client5/http/io/HttpClientConnectionOperator.java