[getdns-api] Add a GETDNS_RETURN_NOT_IMPLEMENTED return code

[Willem Toorop]

Ok, I will append the return code to section 5.2. Like this:

  GETDNS_RETURN_NOT_IMPLEMENTED
      The library did not have the requested API feature implemented.

Object now or forever hold your peace ;)

-- Willem

Op 03-09-15 om 15:31 schreef Willem Toorop:
> Dear spec developers,
> 
> Our implementation (at getdnsapi.net) now offers the possibility to
> compile without recursing resolution modus; for applications that are
> interested in stub resolution only.  When recursing resolution mode is
> tried to be set, our library currently returns a
> GETDNS_RETURN_GENERIC_ERROR (by lack of something better).  I would
> rather return something more specific that indicates unavailability of
> the requested configuration.
> 
> The GETDNS_RETURN_NOT_IMPLEMENTED return code would fit this situation
> much better and could also be used with currently unimplemented features
> (such as TSIG support and call_debugging etc).
> 
> How do you feel about this?
> 
> -- Willem
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