c6a3ab8fc6
refers to the size of the whole ethernet packet, just the DHCP message within the UDP payload, or something else. bootpd interpreted it as a maximum UDP payload size, so it could end up sending fragmented packets to clients (such as some versions of Etherboot) that used different interpretations of the maximum message size. Switch to the most conservative interpretation: ensure that the ethernet packet containing the response is no larger than the specified maximum message size. This matches the behaviour of the ISC dhcpd. MFC after: 1 week