allow AF_UNSPEC for the destination of rip6 send for backward compatibility to buggy old applications.
allow AF_UNSPEC for the destination of rip6 send for backward compatibility
to buggy old applications.

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