Now make_ping_time() in common/util.c returns the time in milliseconds instead

of microseconds.
In fe_set_lag(serv, lag) the lag argument is now in milliseconds as well.

Fixes #758.

src/common/util.c

@@ -1459,7 +1459,7 @@ make_ping_time (void)
 	GTimeVal timev;
 	g_get_current_time (&timev);
 #endif
-	return (timev.tv_sec - 50000) * 1000000 + timev.tv_usec;
+	return (timev.tv_sec - 50000) * 1000 + timev.tv_usec/1000;
 }