patch for total resp time

[Pranav D. <pra...@gm...>]

Hello,

I wanted to get the total resp times of the object individually, since we
have large objects in the test cases for which the first-byte response time
does not give the whole picture of the performance.

I have attached a patch which does that, but I am not sure if I used the
right place (load_next_step) to update the stats, so I would appreciate if
you could review it. I can add the docs for it. Maybe someone else might be
able to use it.

Basically, it update the stat per url in load_next_step using the:

curl_easy_getinfo (cctx->handle, CURLINFO_TOTAL_TIME, &resp_time);

and update the ops log. So someone can parse the ops file to see how a
particular URL performed over a period of time, or plot the overall
performance of all the objects in a webpage/site, which is indicated by the
last operational section in ops.

It generates the following output in *.ops
 Operations:       Success               Failed                 Timed out
                    Avg Resp. Time(secs)
URL0:             1      8                      0      0                0
   0                0.010  0.012
URL1:             1      8                      0      0                0
   0                0.009  0.007
URL2:             1      8                      0      0                0
   0                0.007  0.007
URL3:             1      7                      0      0                0
   0                8.828  8.882
 Operations:       Success               Failed                 Timed out
                    Avg Resp. Time(secs)
URL0:             2      10                     0      0                0
   0                0.012  0.012
URL1:             2      10                     0      0                0
   0                0.007  0.007
URL2:             2      10                     0      0                0
   0                0.007  0.007
URL3:             1      8                      0      0                0
   0                8.903  8.885


and a log entry in *.log, which I don't think is necessary, but I used it to
validate the results so kept it in.
23869 1 3 1 !! END resptime=8.835
25044 1 3 2 !! END resptime=8.935
25892 2 0 1 !! END resptime=0.012


Thanks
-- Pranav