Fetch local IP addresses

[newdep]

Hello Lutz,

I just realized that that its within newlisp not possible to grab
the local ip-addresses a machine has. So when you want to
automate a selection of ip-addresses i.e. where a user could
select from befor starting the program this option could be usefull.

A (net-local 0) could i.e. return if there are 2 addresses and 1 alias ->
("10.10.10.10" "192.168.168.10" "192.168.168.129" )

Is it an option to implement perhpas?

Regards, Norman.