function parses the response to a query of type NS into a
give the contents of the response. The result is stored in allocated
memory and a pointer to it stored into the variable pointed to by
The nameservers are stored into the
field of the
It is the caller's responsibility to free the resulting host structure
when it is no longer needed.
can return any of the following values:
The response was successfully parsed.
The response was malformatted.
The response did not contain an answer to the query.