ssl_session_strndup
if (!ssl_session_strndup(&ret->ext.hostname, as->tlsext_hostname))
if (!ssl_session_strndup(&ret->psk_identity_hint, as->psk_identity_hint))
if (!ssl_session_strndup(&ret->psk_identity, as->psk_identity))
if (!ssl_session_strndup(&ret->srp_username, as->srp_username))