compare addresses in protocol-independent manner
… define a block-local variable.
* kame/kame/dhcp6: added experimental support for the lifetime option based on draft-ietf-dhc-lifetime-00.txt. dhcp6c now restart information-request/reply exchanges when it has received the option and the lifetime expires.
…-API spec. Instead, this program receives MLD report/done only when it works on a router as a IPv6 multicast routing daemon; otherwise it just transmits MLDv1 Query.
in6_addr has to be used, instead of sockaddr_in6.
multicast address should be handled properly. (same as mld6.c rev 1.97)