Add the certificate to the certificate chain that is being used by the current config. 
- Parameters
- 
  
    | config | [IN] TLS link configuration |  | cert | [IN] Certificate to be added |  | isClone | [IN] Indicates whether deep copy is required. The options are true and false. |  
 
- Return values
- 
  
    | HITLS_SUCCESS,if | successful. For details about other error codes, see hitls_error.h. |