transporthandler: Static IPv6 Support
transporthandler: Static IPv6 Support

This change adds basic IPv6 support, with a focus on being able to
configure static addresses and routers. The support for dynamic
configuration is unfortunately tied to IPv4 at the dbus network
interface level, so we can't decouple those settings here.

Change-Id: I72842a374c40a1537437a597020ea898961d67d7
Signed-off-by: William A. Kennington III <30fff5198f4d10ca1117e5f3ec82f3b4b8900d81@google.com>

openbmc/phosphor-host-ipmid,openbmc/phosphor-host-ipmid,openbmc/phosphor-host-ipmid