KEA_QUERY4_RAI	hex string of the entire optin 82
KEA_QUERY4_RAI_CIRCUIT_ID hex string of suboption 1
KEA_QUERY4_RAI_REMOTE_ID hex string of suboption 2

Fix #18

The getMAC method of pkt4 seems to retrieve the mac of the packet sender
which is not the client MAC if a dhcp-relay is used.

The getHWAddr seems to be the method used in the KEA server (it's used in
src/bin/dhcp4/dhcp4_srv.cc of the KEA 1.6.1 sources) and return the
expected MAC address.

I test this patch with KEA 1.6.1 sources and hook release v1.3.1, it work
as expected.
Without this path the MAC address in KEA_QUERY4_HWADDR is the MAC address
of my default gateway, because the packet is forwarded from a dhcp-relay.

Fix for Kea 1.6.x

Removing t1/t2 timers from hook as t1/t2 timers were removed from Kea's Lease struct.

add option 60 handling