[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);
diff --git a/src/log.c b/src/log.c
index e02a81f..6af3464 100644
--- a/src/log.c
+++ b/src/log.c
@@ -67,14 +67,12 @@
 void Alert(const char *fmt, ...)
 {
 	va_list argp;
-	struct timeval tv;
 	struct tm *tm;
 
 	if (!(global.mode & MODE_QUIET) || (global.mode & (MODE_VERBOSE | MODE_STARTING))) {
 		va_start(argp, fmt);
 
-		gettimeofday(&tv, NULL);
-		tm = localtime(&tv.tv_sec);
+		tm = localtime(&now.tv_sec);
 		fprintf(stderr, "[ALERT] %03d/%02d%02d%02d (%d) : ",
 			tm->tm_yday, tm->tm_hour, tm->tm_min, tm->tm_sec, (int)getpid());
 		vfprintf(stderr, fmt, argp);
@@ -90,14 +88,12 @@
 void Warning(const char *fmt, ...)
 {
 	va_list argp;
-	struct timeval tv;
 	struct tm *tm;
 
 	if (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) {
 		va_start(argp, fmt);
 
-		gettimeofday(&tv, NULL);
-		tm = localtime(&tv.tv_sec);
+		tm = localtime(&now.tv_sec);
 		fprintf(stderr, "[WARNING] %03d/%02d%02d%02d (%d) : ",
 			tm->tm_yday, tm->tm_hour, tm->tm_min, tm->tm_sec, (int)getpid());
 		vfprintf(stderr, fmt, argp);
@@ -177,7 +173,6 @@
 {
 	static int logfd = -1;	/* syslog UDP socket */
 	static long tvsec = -1;	/* to force the string to be initialized */
-	struct timeval tv;
 	va_list argp;
 	static char logmsg[MAX_SYSLOG_LEN];
 	static char *dataptr = NULL;
@@ -196,11 +191,10 @@
 	if (level < 0 || progname == NULL || message == NULL)
 		return;
 
-	gettimeofday(&tv, NULL);
-	if (tv.tv_sec != tvsec || dataptr == NULL) {
+	if (now.tv_sec != tvsec || dataptr == NULL) {
 		/* this string is rebuild only once a second */
-		struct tm *tm = localtime(&tv.tv_sec);
-		tvsec = tv.tv_sec;
+		struct tm *tm = localtime(&now.tv_sec);
+		tvsec = now.tv_sec;
 
 		hdr_len = snprintf(logmsg, sizeof(logmsg),
 				   "<<<<>%s %2d %02d:%02d:%02d %s[%d]: ",