fix timewarp in client (server fix later)
diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h
index cdc51cf..ca19a24 100644
--- a/networking/udhcp/common.h
+++ b/networking/udhcp/common.h
@@ -39,6 +39,7 @@
 #include <syslog.h>
 #endif
 
+long uptime(void);
 void background(const char *pidfile);
 void start_log_and_pid(const char *client_server, const char *pidfile);
 void background(const char *pidfile);