[getdns-api] return_api_information and return_call_debugging extensions

[Goyal, Neel]

In looking at the api and debugging extensions (Section 3.6), I wanted to
get the group opinion on a couple of items.

 - What do you think about removing the return_api_information extension
altogether and making this a synchronous call on the context itself?
Something like struct getdns_dict*
getdns_context_get_api_information(context);  This information feels like
it belongs in its own call rather than within a query (which seems even
stranger if it was asynchronous).
 - The return_call_debugging extension has a "query_to" field which is the
address to which the query was sent.  In the case of recursive mode, would
this just be the root server contacted, or would it make more sense to be
a list of servers hit (or none if it was fetched from cache)?

Thanks

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