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.

* Made the incoming line parser more forgiving to allow "name=contents" pairs
where the contents isn't within double quotes.
* Made the digest code return CURLDIGEST_BADALGO if a requested algorithm
isn't supported by the code.

sets the "swsbounce" magic mode. If there follows a request for the SAME
test number and the SAME part number, this mode will make the server bump
the part number internally and thus return a different <dataNUM> section
than it otherwise would.

Test case 153 uses this in case you need an example. It is pretty involved
and hard-to-use, but then the situation is pretty special over all. Enjoy.