Fix forgotten license comments

diff --git a/networking/udhcp/static_leases.c b/networking/udhcp/static_leases.c
index 43f1c98..7540f7f 100644
--- a/networking/udhcp/static_leases.c
+++ b/networking/udhcp/static_leases.c
@@ -5,6 +5,7 @@
  *
  * Wade Berrier <wberrier@myrealbox.com> September 2004
  *
+ * Licensed under GPLv2, see file LICENSE in this tarball for details.
  */
 
 #include "common.h"