void save(Archive& ar, const address_type& ip, const unsigned int version)
{
unsigned long addr = ip.to_ulong();
ar & BOOST_SERIALIZATION_NVP(addr);
}
void save(Archive& ar, const address_type& ip, const unsigned int version)
{
unsigned long addr = ip.to_ulong();
ar & BOOST_SERIALIZATION_NVP(addr);
}