Introcuding a new timestamp for curl_easy_getinfo():

CURLINFO_APPCONNECT_TIME. This is set with the "application layer"
handshake/connection is completed (typically SSL, TLS or SSH). By using this
you can figure out the application layer's own connect time. You can extract
the time stamp using curl's -w option and the new variable named
'time_appconnect'. This feature was sponsored by Lenny Rachitsky at NeuStar.

lib/getinfo.c

@@ -137,6 +137,9 @@ CURLcode Curl_getinfo(struct SessionHandle *data, CURLINFO info, ...)
   case CURLINFO_CONNECT_TIME:
     *param_doublep = data->progress.t_connect;
     break;
+  case CURLINFO_APPCONNECT_TIME:
+    *param_doublep = data->progress.t_appconnect;
+    break;
   case CURLINFO_PRETRANSFER_TIME:
     *param_doublep =  data->progress.t_pretransfer;
     break;