Some of the stuff (e.g., rarpd, bootpd, dhcpd etc., libsa) still will
only support Ethernet. Tcpdump itself should be ok, but libpcap needs
lot of work.
For the detailed change history, look at the commit log entries for
the is-newarp branch.
Correct length arg to haddrtoa() in report of duplicate address.
The string value for a generic tag should not include the null.
(Including the null in reponses really annoys HP printers!)
When reading hardware addresses, allow colon separators
(only works if the whole H/W address is in quotes).