Set whether Permission extensions will be allowed or not. 
Please refer to DOFConnectionConfigBuilder_Create for the default value for this setting.
- Parameters
 - 
  
    | self | The Connection Config Builder. If self is NULL, no action will be taken.  | 
    | extendAllowed | TRUE if permission extensions are allowed, FALSE otherwise. | 
  
   
- Return values
 - 
  
    | TRUE | Permission extend allowed was set to extendAllowed.  | 
  
   
- Exceptions
 - 
  
    | FALSE | Permission extend allowed was not set to extendAllowed.  |