Function for getting supported options from a server. 
- Parameters:
 - 
  
     | curl  | A pointer to an initialized CURL instance  | 
     | url  | string containing the URL to the server. If authentication is required prior to making the call the credentials must be available via CURLOPT_USERPWD before calling.  | 
     | result  | A pointer to a struct _response. If test is true this variable can be NULL. Caller is responsible for freeing associated memory.  | 
     | error  | A pointer to caldav_error.  | 
  
 
- See also:
 - caldav_error 
 
- Parameters:
 - 
  
     | test  | if this is true response will be whether the server represented by the URL is a CalDAV collection or not.  | 
  
 
- Returns:
 - FALSE in case of error, TRUE otherwise.