time: rename Curl_tvnow to Curl_now

... since the 'tv' stood for timeval and this function does not return a
timeval struct anymore.

Also, cleaned up the Curl_timediff*() functions to avoid typecasts and
clean up the descriptive comments.

Closes #2011

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/tftp.c b/lib/tftp.c
index 4e599fd27..a47c24162 100644
--- a/lib/tftp.c
+++ b/lib/tftp.c
@@ -1293,7 +1293,7 @@ static CURLcode tftp_doing(struct connectdata *conn, bool *dophase_done)
     if(Curl_pgrsUpdate(conn))
       result = CURLE_ABORTED_BY_CALLBACK;
     else
-      result = Curl_speedcheck(conn->data, Curl_tvnow());
+      result = Curl_speedcheck(conn->data, Curl_now());
   }
   return result;
 }