IPv6 configuration options

Defines
#define	UIP_LINK_MTU   1280
	The maximum transmission unit at the IP Layer.
#define	UIP_CONF_IPV6   0
	Do we use IPv6 or not (default: no)
#define	UIP_CONF_IPV6_QUEUE_PKT   0
	Do we do per neighbor queuing during address resolution (default: no)
#define	UIP_CONF_IPV6_CHECKS   1
	Do we do IPv6 consistency checks (highly recommended, default: yes)
#define	UIP_CONF_IPV6_REASSEMBLY   0
	Do we do IPv6 fragmentation (default: no)
#define	UIP_CONF_NETIF_MAX_ADDRESSES   3
	Default number of IPv6 addresses associated to the node's interface.
#define	UIP_CONF_DS6_PREFIX_NBU   2
	Default number of IPv6 prefixes associated to the node's interface.
#define	UIP_CONF_DS6_NBR_NBU   4
	Default number of neighbors that can be stored in the neighbor cache.
#define	UIP_CONF_DS6_DEFRT_NBU   2
	Minimum number of default routers.