lipam: Implement -64 argument to generate SLAAC addresses
lipam: Implement -64 argument to generate SLAAC addresses

When using lipam create-host, one can provide an IPv6 prefix address or
network using the '-64' command line argument. The lipam tool will then
generate address records for all combinations of Layer 2 addresses and
IPv6 prefixes using the algorithm described in Appendix A of RFC 4291.

fritz0705/lglass