++ New features:
+ 2011-08-26: Simon Goldschmidt
+ * etharp.c: ETHARP_SUPPORT_VLAN: add support for an external VLAN filter
+ function instead of only checking for one VLAN (define ETHARP_VLAN_CHECK_FN)
+
2011-07-21: Simon Goldschmidt (patch by hanhui)
* ip4.c, etharp.c, pbuf.h: bug #33634 ip_forward() have a faulty behaviour:
Added pbuf flags to mark incoming packets as link-layer broadcast/multicast.