我原来使用mbedtls库来进行https的连接，需要使用api mbedtls_ssl_conf_psk(...)，来设定psk，mbedtls_ssl_conf_psk函数原型如下
/**
* \brief Set the Pre Shared Key (PSK) and the expected identity name
*
* \note This is mainly useful for clients. Servers will usually
* want to use \c mbedtls_ssl_conf_psk_cb() instead.
*
* \note Currently clients can only register one pre-shared key.
* In other words, the servers' identity hint is ignored.
* Support for setting multiple PSKs on clients and selecting
* one based on the identity hint is not a planned feature but
* feedback is welcomed.
*
* \param conf SSL configuration
* \param psk pointer to the pre-shared key
* \param psk_len pre-shared key length
* \param psk_identity pointer to the pre-shared key identity
* \param psk_identity_len identity key length
*
* \return 0 if successful or MBEDTLS_ERR_SSL_ALLOC_FAILED
*/
int mbedtls_ssl_conf_psk( mbedtls_ssl_config *conf,const unsigned char *psk, size_t psk_len,const unsigned char *psk_identity, size_t psk_identity_len );
现在我想直接使用simplink中的Secured Socket功能，但是我没找到相关设置psk的option，请问simplink中的Secured Socket支持设置psk吗？
