Here is a bunch of example/testprograms for the new INET stuff.

udp{serv, clnt } is a pair of test programs for UDP.

Udpserv waits on UDP port 5555 und bounces back all incoming
datagrams to their destination.

Udpclnt connects to port 5555 and writes some datagrams and
waits for the replies from the server printing `Got Ack' if
it detects one.

By default stacksize is set to 0 kB, meaning keep the bare
minimum of memory. This causes udpclnt to print sometimes
wrong things or even crashes it. Therefore the in udpclnt.c
_stksize = xxxxx;

The *lookup programs test the inet library. Note that all
hostlookups are done via /etc/hosts, not via the DNS resolver.
The resolver *should* work, but there is no named on your
machine running, isn't it ? :-) So the resolver falls back to
/etc/hosts.
