fake the type of inp_inputopts6 for w/o INET6 enviroments. (not confirmed that it can actually be compiled on w/o INET6)
fake the type of inp_inputopts6 for w/o INET6 enviroments.
(not confirmed that it can actually be compiled on w/o INET6)

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