Log Message:
Update wide-dhcpv6 to 20070507.

pkgsrc changes:
  Fix hard-coded paths in manual pages.
  Pointed out in PR 36316 by Jonathan A. Kollasch.

Changes:
[Common to all programs]
- supports compilation on Solaris
- supports interface names other than {alphabet}{numeric} format.
- allows a user to specify the owner/group for the installed files.
- fixed a bug that IA-PD/IA-NA cannot coexist in one DHCP message when they
  have the same IA-ID.

[DHCPv6 Relay]
- supported script execution for dhcp6relay.
- accepts ULA
- changes the destination port of a relayed DHCP packet from 546 to 547, when
  it is supposed to be bound for a relay, instead of a client.

[DHCPv6 Server]
- implemented DHCPv6 Confirm message processing
- implemented DHCPv6 Decline message processing
- fixed a Solicitation message validation as stated in RFC3315 15.2.
- fixed a bug that Rebind does not work for IA-NA.
- supported an address pool that has only one entry.
- fixed an IA allocation failure from pool when it doubly requested by the same
  client
- recognizes "-P" option.