Sets the domain wildcard credentials for the server. 
These will be passed on to incoming connections.
- Parameters
 - 
  
    | self | The DOFServerConfigBuilder to add the wildcard domain credentials to. If self is NULL, no action will be taken.  | 
    | credentials | The DOFCredentials to use as wildcard domain credentials. If NULL the previously set credentials will be removed. | 
  
   
- Returns
 - boolean TRUE The DOFCredentials were added to the config. 
 
- Exceptions
 - 
  
    | FALSE | If the DOFCredentials failed to be added.  |