* Printf format check and fix format strings.
* More info in some printfs.
* Be conservative about keeping working routes in RREQ (forward) path.
* Put some spacing between forwarded packet and RREQ.
typedef union uip_ip4addr_t {
u16_t u16[2];
u8_t u8[4];
} uip_ip4addr_t;
typedef uip_ip4addr_t uip_ipaddr_t;
This implies that one must consistently pass pointers to
uip_ipaddr_t:s and not mix and match pointers with
uip_ipaddr_t:s as was done earlier.