[HECnet] Updated DECnet/Linux NML

I've made some fixes to the DECnet/Linux NML server to bring it more in line with other DECnet implementations, and these are enough to make Paul's HECnet mapper happy with Linux nodes now. The only changes are to the dnetnml program, and you can download the new sources from LEGATO::dnetnml.zip. FWIW, my changes were made starting from Erik Olofsen's dnprogs-2.68 from http://rullf2.xs4all.nl/decnet/, but since the only thing that's changed is dnetnml, I don't think it matters much which DECnet/Linux release you are using. And fair warning - this will really only work if your DECnet/Linux machine is an end node. If your DECnet/Linux is a router then it will undoubtedly return some wrong answers (and you will also mostly likely have bigger problems than NML to worry about!). Thanks, Paul, for answering my questions and explaining stuff to me. Bob