Add local IP lookup to acnetd.
It would be useful if
acnetd had a local client command to lookup the IP address of an ACNET node.
I propose adding four new commands and one acknowledgement. The four commands are replacements for older commands: look-up by name, look-up by address, local node info, and default node info. The same, new acknowledgement would be returned for all these commands and contains the address, node name, and IP address.
The older commands are considered deprecated. Maybe
acnetd should write to the log file when a client uses a deprecated command. Also, we should add an ACNET warning status indicating a deprecated feature.