adjustment.
Adding map client_vlans which allows matching server responses with
client requests.
Reformatting Option 82 to include interface name (work in progress,
we need to figure out how to convert VLAN tags to ASCII).
Adjusting tail instead of headers because of complications with
variable length DHCP options - beware that this doesn't appear to work
with veth interfaces. Use a physical NIC for testing for now.
The dhcp-relay utility was initially implemented as part of the
bpf-examples repository, but really belongs here. So import it along with
the build environment from bpf-examples.
Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
