[MEDIUM] remove useless calls to gettimeofday()

send_log(), Alert() and Warning() used gettimeofday() while using
<now> should have been preferred.
diff --git a/src/haproxy.c b/src/haproxy.c
index ef246e6..92dc626 100644
--- a/src/haproxy.c
+++ b/src/haproxy.c
@@ -346,6 +346,7 @@
 
 	/* initialize the libc's localtime structures once for all so that we
 	 * won't be missing memory if we want to send alerts under OOM conditions.
+	 * Also, the Alert() and Warning() functions need <now> to be initialized.
 	 */
 	tv_now(&now);
 	localtime(&now.tv_sec);