with Digest or NTLM. libcurl will now use HEAD to negotiate the authentication
and when done perform the requested POST.

time to restructure this source file!

Good enough?

re-use these sources and functions for subsecond resolution timing

Robin Kay pointed this out.

* bring back subsecond resolution to CURLINFO_TOTAL_TIME
* Fix the Curl_pgrsDone() so that the final progress update is shown properly

directory. The provided ares dir is probably up-to-date, but more importantly
it is often not built yet at the time when this configure script runs.

that we use a library that is recent enough to build with the latest libcurl.

from a name resolve. Without this, we leak memory!

existance of NI_WITHSCOPEID since some platforms have that define but still
can't function with it set.

the specific time to wait for a resolve. The definition is at the top of
this source file.