Fixes in our releases

Improved ND/SAA sanity checks
Fixed number of / interval between DADs
Improved the precision of address expiration timer
Hacked NDP state transition mechanisms
Other random fixes:
router alert option format
checksum for raw sockets
it is mandatory for icmp socket
incorrect checksum with uninitialized buffer
sanity checks against {set,get}sockopt() parameters
Fixes (being) merged into the main kernel tree