multi & hiper examples: updates and cleanups

all multi and hiper examples:

* don't loop curl_multi_perform calls, that was <7.20.0 style, currently
  the exported multi functions will not return CURLM_CALL_MULTI_PERFORM

all hiper examples:
* renamed check_run_count to check_multi_info
* don't  compare current running handle count with previous value, this
  was the wrong way to check for finished requests, simply call
  curl_multi_info_read
* it's also safe to call curl_multi_remove_handle inside the
  curl_multi_info_read loop.

ghiper.c:
* replaced curl_multi_socket (that function is marked as obsolete) calls
  with curl_multi_socket_action calls (as in hiperfifo.c and
  evhiperfifo.c)

ghiper.c and evhiperfifo.c:
* be smart as hiperfifo.c, don't do uncessary curl_multi_* calls in
  new_conn and main

1 files changed, 2 insertions, 4 deletions

diff --git a/docs/examples/multi-debugcallback.c b/docs/examples/multi-debugcallback.c
index fa90bbc48..6d647e66e 100644
--- a/docs/examples/multi-debugcallback.c
+++ b/docs/examples/multi-debugcallback.c
@@ -130,8 +130,7 @@ int main(int argc, char **argv)
   curl_multi_add_handle(multi_handle, http_handle);
 
   /* we start some action by calling perform right away */
-  while(CURLM_CALL_MULTI_PERFORM ==
-        curl_multi_perform(multi_handle, &still_running));
+  curl_multi_perform(multi_handle, &still_running);
 
   while(still_running) {
     struct timeval timeout;
@@ -181,8 +180,7 @@ int main(int argc, char **argv)
     case 0:
     default:
       /* timeout or readable/writable sockets */
-      while(CURLM_CALL_MULTI_PERFORM ==
-            curl_multi_perform(multi_handle, &still_running));
+      curl_multi_perform(multi_handle, &still_running);
       break;
     }
   }