print_options():   - printed all optional info passed as ancillary data   - removed the case of IPV6_RTHDRDSTOPTS
print_options():
  - printed all optional info passed as ancillary data
  - removed the case of IPV6_RTHDRDSTOPTS

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