transmit multicast RA on startup.  without this, reboot of a router will result in "no router" state until the next RA retransmit timeout comes.
transmit multicast RA on startup.  without this, reboot of a router will
result in "no router" state until the next RA retransmit timeout comes.

XXX start() should be merged into the event loop.

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame