made the libcurl.3 one a more generic overview

NTLM patch. Test case 84 and 85 verify this.

Added CURL_VERSION_ASYNCHDNS

weather this is still an "example" or a whole new API layer! ;-)

string reaches > 512 bytes...

work.

call it CURLOPT_WRITEDATA.

options, more frequently used, in a future release

cookie functions need that.

I also fixed the cookie loader to properly load and deal with cookies without
contents (or rather with a blank content).